Database Info

Corrupted memory card format

Hello, recently my micro sd 16gb sandisk memory card got corrupted. i rescued some files, but i can't format it. it says windows was unable to format. my phone don't even recognizes the card and it can't format it. i tried some other software, but no success. maybe it has bad sectors or something. i don't know.
Please help me!
Thank You!

terzer said:
Hello, recently my micro sd 16gb sandisk memory card got corrupted. i rescued some files, but i can't format it. it says windows was unable to format. my phone don't even recognizes the card and it can't format it. i tried some other software, but no success. maybe it has bad sectors or something. i don't know.
Please help me!
Thank You!
Click to expand...
Click to collapse
Terzer,
Sadly, you'll probably have to get a new one. If you try to get it to work, you'll most likely lose even more data! The same thing happened to me only three weeks ago. My card was at most six months old.
Basically, microSD cards are very delicate. As if by fate, I had just read an article about that right before my card went belly up! My new card even has a notice recommending that the card be inserted and removed as few times as possible, for this very reason.
Given this, and given that, for the most part, when they're in good condition they're very reliable, when you start having problems with a card like this, it's FAR more likely that the card has gone bad in some way.
When mine went bad I tried everything I could think of to get it working again. And I succeeded! Trying all different block sizes, I got it to format in the flash drive on my desktop system.
It died again within 48 hours!
I know these things are expensive. Unfortunately, this one is probably a loss. Sorry!
-geo

so the damage is physical?
Thank You!

terzer said:
so the damage is physical?
Thank You!
Click to expand...
Click to collapse
There's no way to tell what the problem is. Basically, though, all problems with flash cards are physical in one sense or another. It's extremely unlikely that it's a driver or card reader error if it was working before. It could be a filesystem error, but if you've already tried to re-format it and failed, well, that doesn't really leave much else.
I don't have your original post in front of me. Did you try formatting it in a computer? If not, then you should definitely try that. (You'll need a microSD to full SD adapter or a microSD to USB.) Also, try doing a full format. (In Windows that means not doing a Quick Format.) A Quick Format just tries to create a new File Table. A full format will try to make a new filesystem. I don't know if there's a way to do an actual hardware format. (Actually, I don't believe that has any meaning on a solid state device.)
Anyway, even if you do get it to format successfully, be very careful what you put on it. That's exactly what happened to me. As I said, after finally getting it to format, it died again in less than two days.
This is about all I can tell you to try. (BTW, I'm a system administrator. ) Basically, and I am really sorry, it's probably dead. I'm guessing they're pretty [email protected]!n expensive in Bulgaria? I know they are here. I almost cried when my first one died!
Although, looking at it in a positive light , when I got my first one they only had Class 2 devices. My new Adata card is Class 6. The difference is amazing. Whatever you wind up doing, my suggestion would be to limit how many times you take it in and out of your phone.

WTF - Warning - SD Card contents

I haven't searched but saying that I've never seen anything like this on Desire or Sensation threads before.
I went to copy something over to the phone (using Windoze Explorer) and when I looked at the contents. I saw the attached. The phone, when I use Root Explorer, and PC agree :-((
For reference I've used Linux, PC (Explorer) and ADB 100% to copy files over successfully before, so no posts about using one or not using one.
All the Filenames etc. have been completely screwed up. Looks like they've been converted to DOS 8.3 format.
I have never ever seen this before. I think I must have run something on the PC when the phone was USB connected. It's about the only thing I can think of, the phone/SD Card/ROM have been 100% reliable so far.
LUCKILY, I made a rare backup of my SD Card yesterday. I usually remember to make one once in a blue moon.
All I can think is to recommend folks to disconnect the USB drive when not needed and do Backups (of the Phone and also the SD Card).
Anyone seen this before ??

sorry to say this to you but your memory card has gone corrupted.
i know this because this has happened to me alot of times.
this happens if you use unbranded memory cards but this also happens to branded memory card.
the only solution i can give to you is buy a new memory card. and the main reason this happen when you connect your phone to your pc/laptop and use it as diskdrive and take the wire out while transferring data.
the only way to prevent is to use a safe remove usb and than change your diskdrive to charge only and wait till everything is loaded and then disconnect your usb wire.
also if you fornat your memory card it will work but i can tell you this that this willhappen again and this could happen without connecting your phone to computer. so to only prevent data loss buy a good new memory card.

Shery4life said:
sorry to say this to you but your memory card has gone corrupted.
i know this because this has happened to me alot of times.
this happens if you use unbranded memory cards but this also happens to branded memory card.
the only solution i can give to you is buy a new memory card. and the main reason this happen when you connect your phone to your pc/laptop and use it as diskdrive and take the wire out while transferring data.
the only way to prevent is to use a safe remove usb and than change your diskdrive to charge only and wait till everything is loaded and then disconnect your usb wire.
also if you fornat your memory card it will work but i can tell you this that this willhappen again and this could happen without connecting your phone to computer. so to only prevent data loss buy a good new memory card.
Click to expand...
Click to collapse
Correct me if I'm wrong but I'm 99.8% sure it still works and he doesn't have to buy a new memory card yet .. I don't know where you get the idea that his memory card is completely dead! It looks like he still has his files, there's just all that junk in there! Worse comes to worst, he has to reformat it which I think may not even be necessary
Anyway, I've had a similar situation as yours and "repairing it" fixed those issues up. I didn't even reformat it, just repaired it. Try that! (Assuming you haven't already reformatted it anyway)

KAwAtA said:
Correct me if I'm wrong but I'm 99.8% sure it still works and he doesn't have to buy a new memory card yet .. I don't know where you get the idea that his memory card is completely dead! It looks like he still has his files, there's just all that junk in there! Worse comes to worst, he has to reformat it which I think may not even be necessary
Anyway, I've had a similar situation as yours and "repairing it" fixed those issues up. I didn't even reformat it, just repaired it. Try that! (Assuming you haven't already reformatted it anyway)
Click to expand...
Click to collapse
Update:
Card is fine. Just the filenames/pathnames got screwed.
As I said luckily I had done a backup of it yesterday, only by accident. I mounted the card on the PC directly (USB adapter) and deleted / copied stuff back.
It must have been something on my PC I ran as it changed the filenames/pathnames to 8.3. I did run something (can't remember the name) as I had problems doing the copy (SD Card to PC) for the backup. A few (4 if I remember) files were too long, exceeded the 255 limit. I D/L something to see what was the issue, turned out to be some book preview I'd accidently down loaded from the market.
All good and working now....
As I said just a warning that **** on the PC can screw the SD Card on the phone.
Backups (Nandroid and SD Card) are a pain but can be life savers.

KAwAtA said:
Correct me if I'm wrong but I'm 99.8% sure it still works and he doesn't have to buy a new memory card yet .. I don't know where you get the idea that his memory card is completely dead! It looks like he still has his files, there's just all that junk in there! Worse comes to worst, he has to reformat it which I think may not even be necessary
Anyway, I've had a similar situation as yours and "repairing it" fixed those issues up. I didn't even reformat it, just repaired it. Try that! (Assuming you haven't already reformatted it anyway)
Click to expand...
Click to collapse
i don't mean that he should buy a new memroy card because after formating/repairing it the memroy card will work but this corruption can happen again. if this happens again the onl;y thing he can do is buy another memroy card. this has hapened to my unbranded memroy card which was 16 gb class 10 and it happened atleast 5-6 times. since i couldn't take another corruption i have ordeered class 10 32gb lexar memory card which is working fine and its hasn't gave me any problem since i've been using it

Man that's what happened to one of my other 4 gb cards I don't use anymore. It was kinda funny. I ended up reformatting it, but an odd thing has happened... 3gbs went down to 1.7gbs... I can't even access the remaining 2gbs... no matter what I've tried.
I didn't buy a new card since it works just fine. Been using it as a "mini" file storage card for 4 months and no issues yet. =D

You sure everythings fine? A lot of files on that card read "0KB" which is definitely not a good thing.
Best of luck.

Anyone with any issues with an SD card should first attempt a low level format.
I'll leave you all to Google that one.
Sent from my MyTouch_4G_Slide

It's fine.
Just that something I used, never used it before, to check filename/pathname lengths (due to FAT issues), seems to have converted everything to DOS 8.3 format. The ones that didn't conform to that were created after a phone re-boot.
This was only as a warning that **** does happen and backups, while a pain in the arse to do, can save a load of pain.
Off to try some ICS ROMs now so expecting a load more pain, d/l, CWM, Wipe, Swear, revert back to CM7. ;-)))) Just need to make sure that nothing updates my HBOOT..

Try .. A Full format of the SD Card
You need to do a Full format and wipe of the SD Card .. I have " fixed" a few this way.
I use: HP USB Disk Storage Format Tool - Seems to work for me

I9505 overheating? Check this, you never know...

Hi everyone,
I just wanted to let you know about what I have found out.
A couple days ago my I9505 started to overheat a lot, although it was not used and in my pocket. At first I thought it was the battery, so I switched it off and took the battery pack out, but it turns out it wasn't hot... but the phone was! Especially the upper part (around the camera, and even on the screen side). I waited and restarted the phone. After a while it did it again and my phone rebooted by itself after a few hours, which was a complete surprise: I have been running the last stable version of SlimBean, which is awesome and really stable for the past couple of months (the reason why although I have tried some KK based rom I ended up going back to 4.3).
Anyway, I though maybe something was wrong with my settings and I decided I would test a few KitKat ROMs, and so I did:
- SlimKat
- OmniRom
- CarbonRom
- AOKP
- CM11
- and a few more...
With all of them, I experienced the same issue. And I had them all for a few hours, because I know at the beginning the phone always retrieves data and apps from google servers, so I figured it was bound to heat, but not that much! And the random reboots happened in all of them.
This morning, I was ready to flash back to a stock ROM to have the phone serviced (I have knox tripped but I don't care, I don't think they would mess around with me about it here in Europe, at least from what I've heard, and anyway, I'd just tell them that Kies did it ), when I realised that Hey! the day before it started, I was unable to copy/paste all the data from my 32GB microSD card to my computer using the USB cable. I would systematically get an error saying that the device has been disconnected from the computer. I had even wondered if my USB cable was damaged, but seeing that the phone charged alright, I did not pay too much attention to it.
I started to investigate the card and retested some ROMs I had tested previously. This time I would not connect, but I did try with and without the card, and BINGO! every time I put the card in, it would overheat.
I then tested my card with an adapter in my computer, and there seemed to be something wrong with it, because even then the copy operation would hang! So I formatted the card (after I had backed up everything I could), and put it into the phone, where I formatted it again with the phone. Now the card has been (albeit empty) for a few hours in the phone, and no overheating or random reboot in sight (running the latest stable SlimKat).
So if your phone starts to overheat, especially the upper part, check what happens when you remove the SD card.
Hope I'll have helped someone with this. If you don't hear more about me in this thread, it means everything's alright. I'll start re-loading things on the same microSD card. I'll see if it is still faulty or if the phone heats up. If it does, I'll try with another microSD and see if it does the same.
Cheers!
Fa

Do tell me if the micro sd card is the problem. I have this overheating issue since a year and haven't been able to sove it. Yet. But i remember trying to rovercome this issue by the micro sd csrd method, it hadn't worked..
Anyways, this issue with s4 is too common, i know 10-15 people with the same issue, so i think its a hardware fault..
Sent from my GT-I9500 using xda premium

Thanks for this, very useful advice. Just recently I was having some issues with my phone not writing to my SD card and the card inexplicably filling up with data. It turned out to be corrupted data in the Android folder, so I backed up my stuff, formatted the card etc and that fixed it (as well as freeing up about 6gb of space on the card)
After reading your post it occurred to me that corrupted data may have been causing overheating in your phone, due to the card constantly being read over and over.
I didn't experience any overheating myself but it could well be the same cause. Either way, definitely worth checking if you're having overheating issues.

Very interesting. I for one reformat my SDcard every 2 to 3 months. Just a simple maintenance that i like to do. This is something good to keep in mind and thank you for sharing mate.

armaan.ag said:
Do tell me if the micro sd card is the problem. I have this overheating issue since a year and haven't been able to sove it. Yet. But i remember trying to rovercome this issue by the micro sd csrd method, it hadn't worked..
Anyways, this issue with s4 is too common, i know 10-15 people with the same issue, so i think its a hardware fault..
Sent from my GT-I9500 using xda premium
Click to expand...
Click to collapse
So! Some more info on this (just in case someone's interested), but first FYI Armaan.ag, the card seemed to be the issue.
I had another microSD card of the same capacity, so I copied every single file that was on the faulty card to my computer, and I noticed there were two mp3 files that were in fact not really mp3 files, but rather some junk that the phone must have created at some point.
I deleted these two files and copied all the rest to the new card, and it works just fine. So at least it's not a hardware issue on the phone: it reads the card content fine and does not overheat (well, IMHO a phone should not overheat when it encounters a corrupted file, but that's another issue)
As for the first (faulty) card, I have formatted it (full format) and checked it for errors. Windows tells me it is fine. I'm now copying all files back to it, I'll test it when it's ready. If it still crashes my phone, then I'll try on my wife's phone (I9300) and see what it does before I return it for exchange (the card is not even 3 months old).
Cheers!
Fa

fabecoool said:
(well, IMHO a phone should not overheat when it encounters a corrupted file, but that's another issue)
Click to expand...
Click to collapse
When the OS is indexing files on the sd card the CPU will be working, if there is corrupted data on the card, it can interfere with the data indexing and cause the OS to read the card over and over. This will keep the CPU active for longer than it needs to be, and when the CPU is active for extended periods of time it can cause overheating.
Alternatively, the overheating could have been caused by a physical fault with the sd card reader or the sd card itself. Either way let us know how you get on.

fabecoool said:
Hi everyone,
I just wanted to let you know about what I have found out.
A couple days ago my I9505 started to overheat a lot, although it was not used and in my pocket. At first I thought it was the battery, so I switched it off and took the battery pack out, but it turns out it wasn't hot... but the phone was! Especially the upper part (around the camera, and even on the screen side). I waited and restarted the phone. After a while it did it again and my phone rebooted by itself after a few hours, which was a complete surprise: I have been running the last stable version of SlimBean, which is awesome and really stable for the past couple of months (the reason why although I have tried some KK based rom I ended up going back to 4.3).
Anyway, I though maybe something was wrong with my settings and I decided I would test a few KitKat ROMs, and so I did:
- SlimKat
- OmniRom
- CarbonRom
- AOKP
- CM11
- and a few more...
With all of them, I experienced the same issue. And I had them all for a few hours, because I know at the beginning the phone always retrieves data and apps from google servers, so I figured it was bound to heat, but not that much! And the random reboots happened in all of them.
This morning, I was ready to flash back to a stock ROM to have the phone serviced (I have knox tripped but I don't care, I don't think they would mess around with me about it here in Europe, at least from what I've heard, and anyway, I'd just tell them that Kies did it ), when I realised that Hey! the day before it started, I was unable to copy/paste all the data from my 32GB microSD card to my computer using the USB cable. I would systematically get an error saying that the device has been disconnected from the computer. I had even wondered if my USB cable was damaged, but seeing that the phone charged alright, I did not pay too much attention to it.
I started to investigate the card and retested some ROMs I had tested previously. This time I would not connect, but I did try with and without the card, and BINGO! every time I put the card in, it would overheat.
I then tested my card with an adapter in my computer, and there seemed to be something wrong with it, because even then the copy operation would hang! So I formatted the card (after I had backed up everything I could), and put it into the phone, where I formatted it again with the phone. Now the card has been (albeit empty) for a few hours in the phone, and no overheating or random reboot in sight (running the latest stable SlimKat).
So if your phone starts to overheat, especially the upper part, check what happens when you remove the SD card.
Hope I'll have helped someone with this. If you don't hear more about me in this thread, it means everything's alright. I'll start re-loading things on the same microSD card. I'll see if it is still faulty or if the phone heats up. If it does, I'll try with another microSD and see if it does the same.
Cheers!
Fa
Click to expand...
Click to collapse
Thanks for this!

Getting an S4 this week so will keep the page bookmarked should I have any of the issues mentioned here. Thanks.

Google plus heated my s4, check settings and unchecked other folders.
Maybe upload on WiFi only. And when charging?
Sent from my GT-I9505 using XDA Free mobile app

Mines doing the same thing.

Everything fine now
Just thought I'd let you know after re-formatting the card:
Complete format with windows, then erase card on the SGS4, which then complained that my card must be formatted, so I formatted it with the phone.
I've been going with the original "faulty" card for more than a week now, and I have had no overheating issue. All the files (except the corrupted files) that were on the card when the problem occurred are back on it. And no issue.
Hope this helps!
Cheers!
Fa

fabecoool said:
Just thought I'd let you know after re-formatting the card:
Complete format with windows, then erase card on the SGS4, which then complained that my card must be formatted, so I formatted it with the phone.
I've been going with the original "faulty" card for more than a week now, and I have had no overheating issue. All the files (except the corrupted files) that were on the card when the problem occurred are back on it. And no issue.
Hope this helps!
Cheers!
Fa
Click to expand...
Click to collapse
1.this is a 7.9mm phone
2.the back cover is thin as a sheet of paper
3.the sdSlot has been installed behind the processor (for speed reasons) and it's made of metal components so there s heat transmission
just replace your cover with the stock one of the 9505 black edition and tell me ..anyway i wanna try this solution tnx in advance

charlie878 said:
1.this is a 7.9mm phone
2.the back cover is thin as a sheet of paper
3.the sdSlot has been installed behind the processor (for speed reasons) and it's made of metal components so there s heat transmission
just replace your cover with the stock one of the 9505 black edition and tell me ..anyway i wanna try this solution tnx in advance
Click to expand...
Click to collapse
You're not wrong at all, but the fact here is that there was a real problem: it was really hot AND there was a huge drain on the battery, which changing the back cover wouldn't have solved.
Besides, I no longer need to do anything, since after formatting the card, it's back to normal, i.e. no overheating. But you're right that heat reaches the surface of the back cover when e.g. downloading or watching streamed videos for some time.
Cheers!
Fa

The i9500 overheats too, so I'll cehck if the SD Card is the problem next time it happens. Thanks!

[Q] 128 gig samsung evo+ not working

Are these samsung evo+ 128gig cards compatible?
The card and packaging look legit and I purchased from amazon (not third party). Manufactured in korea, white edges, valid serial code.
It passed a h2testw test indicating its not fake.
In my phone it cannot format.
I tried formatting in storage settings, says error 13.
In twrp it says "error : 1" and space on card always reported as 0.
If I insert the sdcard to my pc via a usb stick, it can be formatted fine.
Also on the sdcard partition section of twrp, the card shows (with capacity of 0) but cannot be selected.

Additional info
If I insert my older 64gig sdcard phone can use it fine so sdcard slot not damaged.
TWRP seems to act as if there is no sdcard there.
When the phone is booted, the sdcard now doesnt even show in storage screen, however disk info pro shows a unmounted 119gig sdcard, so the card is been detected but it seems for some reason the phone doesnt want to accept it.
I am now rerunning the h2testw again on pc.

So on samsung's official site one of 2 reviews said he had same issue, not working in S7 but working on PC and tablets.
Then I find another site that says someone has it working fine.
I find it odd samsung would make an sd card that doesnt work in their flagship phone, am I the only one here to try their 128 gig card?

chrcol said:
So on samsung's official site one of 2 reviews said he had same issue, not working in S7 but working on PC and tablets.
Then I find another site that says someone has it working fine.
I find it odd samsung would make an sd card that doesnt work in their flagship phone, am I the only one here to try their 128 gig card?
Click to expand...
Click to collapse
Hi mate
That is odd , I have a Evo 128G Pro + and works just fine...

indeed and works in my s5 also wtf (photo)
so works on pc and s5 but not s7
but 64 gig works fine in s7
i guess i may have partial faulty card slot that doesnt affect 64 gig card somehow?
i also considered seating issue as this tray system is bit flimsy but reseated it dozen times now

also attaching twrp log
Is it possible installed rom could break it? I would think installed rom have no affect on TWRP side, I did already try to see if superstock kernel instead of superkernel works but has no affect.

chrcol said:
also attaching twrp log
Is it possible installed rom could break it? I would think installed rom have no affect on TWRP side, I did already try to see if superstock kernel instead of superkernel works but has no affect.
Click to expand...
Click to collapse
Anything is possible, I have a Superstock rom, with superstock kernel from same dev and is working fine..........
If you feel like it you can always , do a nandroid (TWRP) , flash a stock rom do the test and confirm if it is a rom issue or a hardware issue, afterwards re install TWRP and your nandroid backup--

Still broken with superstock rom
So I guess either issue with card or phone, sadly it does seem phone is more likely, I dont know if could be resolved with carrier as I rooted phone. I will exchange sdcard first tho and hope that resolves it.
Also in past if there is issue with sdcard it has said sdcard corrupted, on this issue it says sdcard unsupported.
format error is this with 0 hits on search "400 106 command failed"
--edit--
after I ammended post with phone sitting idle I did yet another format which then reached 100%
However card isnt working, now shows the size and says corrupted, everytime I hit format now it reaches 100% but remains unuseable.
--edit --
Now got a 400 113 command failed and asking me to insert sdcard.
Phone still seems to have superman bootloader, if I reboot the superman logo appears at start.

chrcol said:
Still broken with superstock rom
So I guess either issue with card or phone, sadly it does seem phone is more likely, I dont know if could be resolved with carrier as I rooted phone. I will exchange sdcard first tho and hope that resolves it.
Also in past if there is issue with sdcard it has said sdcard corrupted, on this issue it says sdcard unsupported.
format error is this with 0 hits on search "400 106 command failed"
--edit--
after I ammended post with phone sitting idle I did yet another format which then reached 100%
However card isnt working, now shows the size and says corrupted, everytime I hit format now it reaches 100% but remains unuseable.
--edit --
Now got a 400 113 command failed and asking me to insert sdcard.
Phone still seems to have superman bootloader, if I reboot the superman logo appears at start.
Click to expand...
Click to collapse
Strange.....
Did you ever use this card with your phone when it was stock? why dont you go full stock (Odin) and check? maybe something went wrong when flashing TWRP or custom rom

I have now reflashed the bootloader and also tried older bootloaders, that got rid of the superman bootloader, still a no go, but I think I have discovered something.
If I insert the 64gig card and pull it out again, it always remains snug in the tray.
With the 128 gig card its always raised, I have to sort of push it down again, but always raised again when pulling it out.

chrcol said:
I have now reflashed the bootloader and also tried older bootloaders, that got rid of the superman bootloader, still a no go, but I think I have discovered something.
If I insert the 64gig card and pull it out again, it always remains snug in the tray.
With the 128 gig card its always raised, I have to sort of push it down again, but always raised again when pulling it out.
Click to expand...
Click to collapse
That for sure could be an issue, when you said raised is because is curved or is because is flat and do not fit right on the tray?

and now it isnt working in the S5 which has made me happy as the evidence is now pointing to the card. TWRP just waits forever when loading if its inserted on the S5.
I have already ordered a replacement and arranged return, just need to haggle amazon for getting my delivery refunded for the second order.
Also the card came from a 3rd party fulfilled from amazon, this time I made sure to select amazon direct. I also dont think I will be testing it in PC first as I am been paranoid of the sdcard usb stick damaged the card physically.
Its raised as in it seems to be pushed upwards after inserted in phone, the card does fit in the tray but seems loose and not so tight. Examining the cards closer they seem to have slightly different thicknesses.
--edit--
Also dead in PC

chrcol said:
and now it isnt working in the S5 which has made me happy as the evidence is now pointing to the card. TWRP just waits forever when loading if its inserted on the S5.
I have already ordered a replacement and arranged return, just need to haggle amazon for getting my delivery refunded for the second order.
Also the card came from a 3rd party fulfilled from amazon, this time I made sure to select amazon direct. I also dont think I will be testing it in PC first as I am been paranoid of the sdcard usb stick damaged the card physically.
Its raised as in it seems to be pushed upwards after inserted in phone, the card does fit in the tray but seems loose and not so tight. Examining the cards closer they seem to have slightly different thicknesses.
--edit--
Also dead in PC
Click to expand...
Click to collapse
That makes more sense , they do look flimsy the less you touch them the better , glad you solved the mystery

new card is here and working. It fits much tighter, even tighter than the 64 gig card. I have split the card 50/50 between portable and adoptable storage and in process of copying files back to it from PC. Is a relief as didnt fancy the situation of a broken sd card slot on phone.

chrcol said:
new card is here and working. It fits much tighter, even tighter than the 64 gig card. I have split the card 50/50 between portable and adoptable storage and in process of copying files back to it from PC. Is a relief as didnt fancy the situation of a broken sd card slot on phone.
Click to expand...
Click to collapse
Tight is good........
Glad is working mate ,thanks for the info

is the card accessible on other devices and in PC's?
Is it formated in FAT32?
You can try fix format using an external tool such as:
https://www.sdcard.org/downloads/formatter_4/index.html
http://www.easeus.com/storage-media-recovery/sd-card-usb-drive-pen-drive-0-bytes.html
http://www.easeus.com/data-recovery/fix-sd-card-0-bytes.html
I once format a microsd which after the proccess start showing as being just a few kb capacity and fully used.
Only after a while I discovered a tool that was capable of restoring and fixing the card. I think was the tool from the first link above.
I would try formatting the card and restore to factory state
BTW: I am waiting to receive one of these http://www.ebay.co.uk/itm/282396124562?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

Discussion of SDcards used on any device

Moving the intent of a few posts on LineageOS thread to here.
rb1979 said:
Hi everyone,
Some of you reported that SD Card stopped working. This happened to me too today after about 20 hours after the latest update. The case with me is it doesn't fix itself even after a restart. I'm kind of stuck, whatever I want to do with the SD Card it wants me format it. I always had it as internal storage with apps and other things there. I have the the backup from the before the update. Will that fix if I restore it? Just want to mention that I update every week and never missed one. I had very minor issues up until now. Week in and week out everything has been fine and I started using the rom with the first release, all clean, full format and then weekly over the air updates every single week.
If anybody know any solution please let me know, if nothing works or I don't hear anything I'll probably try the backup restoration. BTW, to be specific about SD card no working I always get two notifications, one is "Unsupported SanDisk SD card" and the other is "SanDisk SD card missing"
Thank you
Click to expand...
Click to collapse
KrisM22 said:
Use a card brand other than sandisk and size 32GB or less.
Click to expand...
Click to collapse
rb1979 said:
Thank you for you help, I really appreciate it. The problem I see, right or wrong, is that I had this card for a year with no issues, first under stock rom, then under CM, and now under LineageOS up until the latest update with no issues at all. So it's just hard for me to take the card as the problem. Especially after seeing other people reporting it too lately. Do you have more information than just that? Meaning LineageOS and won't ever get along with sandisk or size larger than 32GB because of some external hardware limitation or something like that. Or this is just general knowledge what works best with LineageOS? In the first case I can think about case I can go and invest into a new card but in the second case I can just wait it out until codebase improves. It would good to know more so I can make better decisions.
Thanks for your help again.
Click to expand...
Click to collapse
KrisM22 said:
In my experience, most folks presenting SDcard problems have sandisk. I personally have had problems with sandisk that has led me to avoid them. I prefer samsung. There are many others. edit currently using a pny U3 32GB, but it's an old one and only does 56/29MBs R/W.
Click to expand...
Click to collapse
adityak1303 said:
+1 @KrisM22. I agree that almost all the users that state that there's a problem with their SD card were using a SanDisk SD card including myself. @rb1979, if you really think that your card isn't faulty, then try using it in some other phone. If you face the same errors then your card is faulty. If it works fine on the other phone, only then can it be considered as a problem with the ROM.
Click to expand...
Click to collapse
rb1979 said:
Thanks both of you, I'll do some testing around and get back to you with my findings.
Click to expand...
Click to collapse
KrisM22 said:
I just ordered one of these because I want to test the 64GB thing as it keeps coming up.
Samsung 64GB 100MB/s (U3) MicroSDXC EVO Select Memory Card with Adapter (MB-ME64GA/AM) - $23 + some silly $3 thing to get free shipping over $25. There are faster ones out there but I'm a cheapskate and don't use it enough to justify it.
Click to expand...
Click to collapse
That's most of it - then it goes verbose and wobbly.
I welcome any and all comments about SDcards!
There is no OT here but remember the XDA rules and try to be nice to folks. You can learn without trying to control others' behaviour.
No need to pretend you are TD. (allusion to Alice in Wonderland - Top Doormouse)

Thanks for creating this thread. There are surprisingly few other recent threads that discuss this topic on XDA apart from the one I've previously linked to (https://forum.xda-developers.com/android/help/micro-sd-write-access-format-exfat-t3358275). Also, I'm bringing over the well informed SD related comments that you left behind.
---------------------------
I've got to push back on the apriori assumption that these are specifically Sandisk brand card issues without knowing the specific details of the issues and seeing actual logs, and also without knowing the history of the individual cards in question (details of every device it was connected to and how it was connected, what OS and what file management methods were used, and how full the card typically is, and how frequently it might be disconnected in the middle of a file operations, among other things).
We must be mindful of the fact that the majority of SD cards in circulation are Sandisk cards which means that the majority of reported problems will be on Sandisk cards but this does not mean that the Sandisk cards are experiencing proportionately more issues than other brands. I don't doubt individual experiences, but it they may not speak to a larger picture. For example: Having supported large systems (>300 devices) running Linux directly from SD cards I did not see more problems with Sandisk cards than others. We've not seen enough evidence here to declare that this this is a Sandisk problem.
rb1979 said:
...I had this card for a year with no issues, first under stock rom, then under CM, and now under LineageOS up until the latest update with no issues at all.So it's just hard for me to take the card as the problem
Click to expand...
Click to collapse
The fact that a card has been used for a long time under different circumstances does not support a logical argument that the problem is in the ROM, in fact that supports the logical argument that the problem is with the card.
adityak1303 said:
....if you really think that your card isn't faulty, then try using it in some other phone. If you face the same errors then your card is faulty. If it works fine on the other phone, only then can it be considered as a problem with the ROM.
Click to expand...
Click to collapse
Good advise since, if the cards is having problems it should bring the problems to the other devices. Testing a different card in the first device on which the problem was noticed is also a good test.
--------------------------
Here is some supplemental information specific to Sandisk SD cards' built in data protection on cards experiencing failure. https://forum.xda-developers.com/android/help/micro-sd-write-access-format-exfat-t3358275. To summarize what is there: An SD card may begin to fail unknown to us, and then when the built in data protection is invoked it "breaks" the card with a dirty bit at beginning of drive so it cannot be written to or formatted but still allows us to copy data. The symoptoms when that data protection is invoked are similar to those bing reported by people who can no longer mount the card in Android devices (Android devices require read and write access to mount the card, unlike when the card is access via card reader on computer).

Just an update. I tried to format the card as portable storage (after this failure as internal and being burned I have hard time trusting it now) but it fails. I didn't do any testing with other phones just went straight for format. I might just buy another card. I think the phone specs say it's 32 GB max, is it still the case with different OS or not (meaning it was due to software not hardware) if I could get something higher than 32 (the current broken one is 32) I would go for it.
Thanks

rb1979 said:
Just an update. I tried to format the card as portable storage (after this failure as internal and being burned I have hard time trusting it now) but it fails. I didn't do any testing with other phones just went straight for format. I might just buy another card. I think the phone specs say it's 32 GB max, is it still the case with different OS or not (meaning it was due to software not hardware) if I could get something higher than 32 (the current broken one is 32) I would go for it.
Thanks
Click to expand...
Click to collapse
I believe after you use it as internal, and then try to use it as external, you first have to write an MBR on it and a partition formatted FAT32. i use a bootable stand-alone GPARTED to do that.
http://gparted.org/
Moto says it's limit is 32GB. Folks have, I believe, used much bigger cards on it. Don't know what is the limiting factor - be it software (ROM) , hardware, or licensing (exfat for Microsoft). I have ordered a 64GB Sammy which I should get in 1/2 week so I can test. Course I wouldn't be doing exactly what you would be doing so the test would only show that the G3 could read/write to it. I will only use it as external storage. I don't really "need" 64GB but it will allow me to be a bit more sloppy vis a vis nandroid backups.
It could be that after you format yours, that it will suddenly work just fine. Then again I just had a thumb drive go belly-up from I/O errors - once in a great while, it happens.

KrisM22 said:
... Moto says it's limit is 32GB. Folks have, I believe, used much bigger cards on it. Don't know what is the limiting factor .
Click to expand...
Click to collapse
I've got a 128gb in my Moto G (3rd - XT1540 2GB), and I have used the card for a long time. It works just fine for me, and the space is obviously fantastic to have. Every now and then (every few months or so, I'd say - maybe 3 times in the 18 months I've had it), it does become corrupted, though, and I get those same error messages. A backup, wipe/re-format, and restore, and I put it right back in my phone and it works just fine again. Seems like that's happened in other devices, though, too.
The card is a SanDisk Ultra SL128 (Class 10/UHS-1, man'd Jan 2016). I've only ever used it for external storage, never adopted, and I've only ever formatted the card as FAT32, using my PC. I'm running stock Android 6.0 24.24.1 at the moment, with TWRP.

beachfl said:
I've got a 128gb in my Moto G (3rd - XT1540 2GB), and I have used the card for a long time. It works just fine for me, and the space is obviously fantastic to have. Every now and then (every few months or so, I'd say - maybe 3 times in the 18 months I've had it), it does become corrupted, though, and I get those same error messages. A backup, wipe/re-format, and restore, and I put it right back in my phone and it works just fine again. Seems like that's happened in other devices, though, too.
The card is a SanDisk Ultra SL128 (Class 10/UHS-1, man'd Jan 2016). I've only ever used it for external storage, never adopted, and I've only ever formatted the card as FAT32, using my PC. I'm running stock Android 6.0 24.24.1 at the moment, with TWRP.
Click to expand...
Click to collapse
Thanks - Becoming corrupted every 6 months seems excessive, but with heavy use...? So what do you use it for? Also it sounds like you are using something other than the phone to format it...?
At least you are ready for it and just re-format it!

beachfl said:
I've got a 128gb in my Moto G (3rd - XT1540 2GB), and I have used the card for a long time. It works just fine for me, and the space is obviously fantastic to have. Every now and then (every few months or so, I'd say - maybe 3 times in the 18 months I've had it), it does become corrupted, though, and I get those same error messages. A backup, wipe/re-format, and restore, and I put it right back in my phone and it works just fine again. Seems like that's happened in other devices, though, too.
The card is a SanDisk Ultra SL128 (Class 10/UHS-1, man'd Jan 2016). I've only ever used it for external storage, never adopted, and I've only ever formatted the card as FAT32, using my PC. I'm running stock Android 6.0 24.24.1 at the moment, with TWRP.
Click to expand...
Click to collapse
That may not be drive corruption but rather a corrupted file or files. If it is localize drive corruption it may still be there without having any impact until some data is written to that part of the drive. Unlike platter based hard drives, when these drives actually start to fail they may invoke a built in data protection (dirty bit) which resembles being locked in read only mode preventing the drive from being formatted which is obviously not your case. Have you ever done a sector scan of the drive, eg chkdsk <driveletter> /f /r or done a full format (as opposed to quick format)? Either of those things may flush out localized damage and the scan might fix it but they would take a long time.

KrisM22 said:
Thanks - Becoming corrupted every 6 months seems excessive, but with heavy use...? So what do you use it for? Also it sounds like you are using something other than the phone to format it...?
At least you are ready for it and just re-format it!
Click to expand...
Click to collapse
Yeah I guess it is kinda a small PITA lol. Could just be from me starting and cancelling or moving too many things at once, I don't know.
I've never actually come close to needing all that space to TBH. I could probably do just fine with a 64, but it's nice to know I could record or store hours of HD video, for example, if I need it. I got nearly 30 gigs of music on it. I keep tv and movies on there, too, in case I get caught bored somewhere. Full Nandroid and Titanium backups are on there, as well.
I use a microSD adapter and a small (76 kb) utility for Windows called FAT32Format (Ridgecorp).
---------- Post added at 22:00 ---------- Previous post was at 21:45 ----------
IronTechmonkey said:
That may not be drive corruption but rather a corrupted file or files. If it is localize drive corruption it may still be there without having any impact until some data is written to that part of the drive. Unlike platter based hard drives, when these drives actually start to fail they may invoke a built in data protection (dirty bit) which resembles being locked in read only mode preventing the drive from being formatted which is obviously not your case. Have you ever done a sector scan of the drive, eg chkdsk <driveletter> /f /r or done a full format (as opposed to quick format)? Either of those things may flush out localized damage and the scan might fix it but they would take a long time.
Click to expand...
Click to collapse
I've had that problem before, too, but not on the 128 I have in my phone now. That is very frustrating. One of my 32 gb cards suddenly went into "read-only" mode as you describe, and nothing I can do will get it useable again. All the files are still readable from it (except the part of one huge video file that is on the bad sector that seems to have caused the problem).
So right, my 128 card doesn't have that problem, and seems to be corrupted files, as you say, not the drive itself. I do actually do what you talk about - when I do find I have to re-do the 128 sd card in my phone, I run a Windows chkdsk /r before I re-format it, and a chkdsk /f afterward, as a check. The chkdsk /r does take quite a while, yeah .. a few hours.
Cheers

beachfl said:
Yeah I guess it is kinda a small PITA lol. Could just be from me starting and cancelling or moving too many things at once, I don't know.
I've never actually come close to needing all that space to TBH. I could probably do just fine with a 64, but it's nice to know I could record or store hours of HD video, for example, if I need it. I got nearly 30 gigs of music on it. I keep tv and movies on there, too, in case I get caught bored somewhere. Full Nandroid and Titanium backups are on there, as well.
I use a microSD adapter and a small (76 kb) utility for Windows called FAT32Format (Ridgecorp).
---------- Post added at 22:00 ---------- Previous post was at 21:45 ----------
I've had that problem before, too, but not on the 128 I have in my phone now. That is very frustrating. One of my 32 gb cards suddenly went into "read-only" mode as you describe, and nothing I can do will get it useable again. All the files are still readable from it (except the part of one huge video file that is on the bad sector that seems to have caused the problem).
So right, my 128 card doesn't have that problem, and seems to be corrupted files, as you say, not the drive itself. I do actually do what you talk about - when I do find I have to re-do the 128 sd card in my phone, I run a Windows chkdsk /r before I re-format it, and a chkdsk /f afterward, as a check. The chkdsk /r does take quite a while, yeah .. a few hours.
Cheers
Click to expand...
Click to collapse
Great that you're running chkdsk on it. May be caused if you cancel or something happens in the middle of a move. Only other thing I could suggest is to do your format on the phone itself, after you've done everything else on the PC. Don't know if that would make a difference. Shouldn't but I've run across vy experienced folks saying to do that. But... Yeah you've got me hankering to put a 128GB on it...
edit: for read only cards before you trash them I would run them by gparted just to see if re-creating the MBR and partition would change its mind. I have successfully done that with thumb drives but not with cards/adapter/reader.

KrisM22 said:
Great that you're running chkdsk on it..
edit: for read only cards before you trash them I would run them by gparted just to see if re-creating the MBR and partition would change its mind. I have successfully done that with thumb drives but not with cards/adapter/reader.
Click to expand...
Click to collapse
Yeah, thanks for reminding me about fixing the errors, IronTechmonkey. It's kinda an important step I forgot to mention.
I not sure I have the bad card still. I didn't think about GParted, should have. I tried Paragon, among other things, but to no avail.

What speeds are folks getting from a U3 SDE card? I bought what I thought was a 100/60MB/s card and it does about what my old PNY card did - R=40-50, W=34-40MB/s. Is the phone the limiting factor or did I get a bum card?

KrisM22 said:
What speeds are folks getting from a U3 SDE card? I bought what I thought was a 100/60MB/s card and it does about what my old PNY card did - R=40-50, W=34-40MB/s. Is the phone the limiting factor or did I get a bum card?
Click to expand...
Click to collapse
AFAIK the the phone hardware/OS is unlikely to meet the advertised speeds of the cards. Likewise and perhaps more so for USB 2.0 ports and anything using MTP.
I dont know how this compares but for what it is worth: With a Sandisk Utra SDHC (Class 10 - Video, Ultra High Speed Class 1 - whatever that jargon means) touting 80 MB/s read speeds and 40 MB/s* write speeds; the read speeds did consistently approach the rating (getting hot enough to scorch the logo) and the wite speed occasional did. Another factor is the size of files being copied, larger quantities of smaller files taking more time per MB, unless using some dedicated test utility I've never actually done a test of SD r/w speeds on the device. What are you using to measure those?
* In re write speed ratings: Digging into the small print of the specifications may reveal that the manufacturer uses different size cards each for the reed and write speed ratings, effectively padding the write speeds by citing test results from smaller capacity cards.

IronTechmonkey said:
AFAIK the the phone hardware/OS is unlikely to meet the advertised speeds of the cards. Likewise and perhaps more so for USB 2.0 ports and anything using MTP.
I dont know how this compares but for what it is worth: With a Sandisk Utra SDHC (Class 10 - Video, Ultra High Speed Class 1 - whatever that jargon means) touting 80 MB/s read speeds and 40 MB/s* write speeds; the read speeds did consistently approach the rating (getting hot enough to scorch the logo) and the wite speed occasional did. Another factor is the size of files being copied, larger quantities of smaller files taking more time per MB, unless using some dedicated test utility I've never actually done a test of SD r/w speeds on the device. What are you using to measure those?
* In re write speed ratings: Digging into the small print of the specifications may reveal that the manufacture uses different size cards each for the reed and write speed ratings, effectively padding the write speeds by citing test results from smaller capacity cards.
Click to expand...
Click to collapse
Thanks.
Interesting - so you were testing it on windows (?) I did test them on linux and got W=74 on the PNY and 77MBs on the Samsung. That's through a USB3 cardreader.
On the phone I used A1 SD Bench, SD card test, and disk speed test.
Off to try windows...
I was just going to boot up a WinPE and test it there. What prog did you use to test it?

Yes, both of these cards test at about R=81 , W=66.

KrisM22 said:
Thanks.
Interesting - so you were testing it on windows (?) I did test them on linux and got W=74 on the PNY and 77MBs on the Samsung. That's through a USB3 cardreader.
On the phone I used A1 SD Bench, SD card test, and disk speed test.
Off to try windows...
I was just going to boot up a WinPE and test it there. What prog did you use to test it?
Click to expand...
Click to collapse
Yes, Windows 7, which reports file data transfer speeds in the copy process window so I did not use a utility. I've done this enough times in geneal, and a few times specifically with large files and a stopwatch, so I know the speed in the file copy window is relatively accurate (for single large files). The speeds you get on linux seem reasonable. I'll test A1 SD Bench on Osprey when I have a chance. Thanks.
---------- Post added at 11:09 PM ---------- Previous post was at 11:08 PM ----------
KrisM22 said:
Yes, both of these cards test at about R=81 , W=66.
Click to expand...
Click to collapse
Also seemingly reasonable.

My card seem to be working just fine on my Lineage OS. I rebooted by device and now it says it's corrupted. Is there any way out? Will I be able to get my data back?

jay.bhadra1995 said:
My card seem to be working just fine on my Lineage OS. I rebooted by device and now it says it's corrupted. Is there any way out? Will I be able to get my data back?
Click to expand...
Click to collapse
My suggestion would be to copy whatever you can off it and re-format it asap. If you can't read it via phone, try PC.
EDIT: I am assuming you are using it as external. If you are using it as internal, I believe you have lost everything. I know of nothing that can read it. GPARTED can only re-add an MBR and a partition and make it usable again, but all data is lost.

KrisM22 said:
My suggestion would be to copy whatever you can off it and re-format it asap. If you can't read it via phone, try PC.
EDIT: I am assuming you are using it as external. If you are using it as internal, I believe you have lost everything. I know of nothing that can read it. GPARTED can only re-add an MBR and a partition and make it usable again, but all data is lost.
Click to expand...
Click to collapse
Yeah. I copied everything and made a backup. Luckily I use it only as a storage device and not an internal drive for apps. But how do I re-format it? I tried using the format option that my phone gives me but to no avail.

jay.bhadra1995 said:
Yeah. I copied everything and made a backup. Luckily I use it only as a storage device and not an internal drive for apps. But how do I re-format it? I tried using the format option that my phone gives me but to no avail.
Click to expand...
Click to collapse
Do you have a little card reader so you can plug it into your PC?

KrisM22 said:
Do you have a little card reader so you can plug it into your PC?
Click to expand...
Click to collapse
No. Sadly I don't. Is there no other way round to format it?