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[Q] Media Scanner doesn't detect external SD Card. Certain apps can't read files

Recently, I installed a custom ROM (Xperia Z Fusion) for my aging Xperia miro. I installed everything such as the ROM itself, the required GAPPS, and a certain ROM Mod for the said ROM (also from the dev himself). Now, my media scanner can't detect the External SD card.
I've also noticed that when I connected the phone to my PC, the PC can't read the External SD Card as well.
But when directly connect the External SD Card to the PC itself (using a Card reader), it can read the SD cards. Fortunately, the files weren't corrupted by any means.
How can I solve this?
EDIT
One thing that I've also noticed thus far: Before, the phone recognizes my phone memory as phone memory (derp). But now, it is recognized as Internal Memory, and Internal Memory is now recognized as SD Card.

All rom have bugs . I think the best decision for you is to back on stock rom
try this to fix http://forum.xda-developers.com/xpe...eria-z-rom-t2187500/post41991556#post41991556

degama said:
All rom have bugs . I think the best decision for you is to back on stock rom
try this to fix http://forum.xda-developers.com/xpe...eria-z-rom-t2187500/post41991556#post41991556
Click to expand...
Click to collapse
I already did that. Thanks anyway.

[CM13.0] Internal storage problem

Hello.
I have just wiped my device and installed the newest CM13.0 - Marshmallow (LG G3 D855). After rebooting and configuring my phone I got an information that my SD card is unknown. After pressing the notification the phone asked me if I want to use my SD card as external or internal storage. I read about this in the Web and decided to choose the 2nd option. The card was formatted (it was stucked at 20% for couple minutes and after that time progress bar disappeared - no information about success or errors). Internet said me to reboot my phone after the operation is completed.
Now I have a problem. External storage disappeared. I was expecting it to be a part of my old internal storage (about 10GB + 64GB of my SD). What I saw was still 10GB and nothing more. I tried to go to the settings and checked `Storage and USB`. I found my card but I couldn't check the size and anything (there was an information "Checking...", which didn't refreshed even after 2h of waiting...). I think my SD was FAT32, but I'm not sure.
Now when I put the card into my PC i see it has 16MB of size. I tried to format it with size adjustment into NTFS, exFAT and FAT32 - the size of 64GB came back but after doing factory reset and configuring everything in the same way as I described before, I get same issues (using all the file systems).
After all I got angry and decided to choose using my SD normally as an external storage. In this case I see my card and I'm able to copy data on it, BUT... It has size of 16MB... I'm tired of this and really don't have any ideas how to repair it. I don't care if it is internal or external storage. I want this to start working as expected.
Informations:
- LG G3 D855
- CM13.0 (cm-13.0-20151127-NIGHTLY-d855.zip (290.07 MB))
- MicroSDXC ADATA 64GB CLASS-10 (AUSDX64GUICL10RA1)
[EDIT - SOLVED PARTIALLY]
I have partially solved the problem. I noticed that this 16MB is just a swap space. Probably that's why Android saw it as a partition to use.
I managed to set my SD as an external storage. I used EaseUS Partition Master. I deleted all partitions on my card. Next I created a new UNFORMATTED partition (just a raw partition). Then I put my card into the microSD slot in my G3 and started the phone. I chose `external storage` option and it worked! I tried the same for internal but it hangs at 20% and gets an exception. So for now until they fix this, I will use it in the old way.

Nickon said:
Hello.
I have just wiped my device and installed the newest CM13.0 - Marshmallow (LG G3 D855). After rebooting and configuring my phone I got an information that my SD card is unknown. After pressing the notification the phone asked me if I want to use my SD card as external or internal storage. I read about this in the Web and decided to choose the 2nd option. The card was formatted (it was stucked at 20% for couple minutes and after that time progress bar disappeared - no information about success or errors). Internet said me to reboot my phone after the operation is completed.
Now I have a problem. External storage disappeared. I was expecting it to be a part of my old internal storage (about 10GB + 64GB of my SD). What I saw was still 10GB and nothing more. I tried to go to the settings and checked `Storage and USB`. I found my card but I couldn't check the size and anything (there was an information "Checking...", which didn't refreshed even after 2h of waiting...). I think my SD was FAT32, but I'm not sure.
Now when I put the card into my PC i see it has 16MB of size. I tried to format it with size adjustment into NTFS, exFAT and FAT32 - the size of 64GB came back but after doing factory reset and configuring everything in the same way as I described before, I get same issues (using all the file systems).
After all I got angry and decided to choose using my SD normally as an external storage. In this case I see my card and I'm able to copy data on it, BUT... It has size of 16MB... I'm tired of this and really don't have any ideas how to repair it. I don't care if it is internal or external storage. I want this to start working as expected.
Informations:
- LG G3 D855
- CM13.0 (cm-13.0-20151127-NIGHTLY-d855.zip (290.07 MB))
- MicroSDXC ADATA 64GB CLASS-10 (AUSDX64GUICL10RA1)
Click to expand...
Click to collapse
i cant say this will work, but if i had your problem i would clean off the rom and flash it again, and while in twrp before booting, format your sd card. if that doesnt help, i dont know what else to try.
i didnt know this storage option was added to cm13, but anyways, i would never use external storage as internal. ii have seen people try for years, and usually come back with some problems.

bweN diorD said:
i cant say this will work, but if i had your problem i would clean off the rom and flash it again, and while in twrp before booting, format your sd card. if that doesnt help, i dont know what else to try.
i didnt know this storage option was added to cm13, but anyways, i would never use external storage as internal. ii have seen people try for years, and usually come back with some problems.
Click to expand...
Click to collapse
Tried to reinstall... Same thing happens...

Nickon said:
Tried to reinstall... Same thing happens...
Click to expand...
Click to collapse
well, you have 10 post now, i would try asking in the thread where you got the rom. i dont know what else to suggest. sorry.

bweN diorD said:
well, you have 10 post now, i would try asking in the thread where you got the rom. i dont know what else to suggest. sorry.
Click to expand...
Click to collapse
From official Cyanogenmod website.

Nickon said:
From official Cyanogenmod website.
Click to expand...
Click to collapse
its impossible that there is a thread on xda in the g3 section though right? cause thats not what we do here, post roms and such...

Nickon said:
[EDIT - SOLVED PARTIALLY]
I have partially solved the problem. I noticed that this 16MB is just a swap space. Probably that's why Android saw it as a partition to use.
I managed to set my SD as an external storage. I used EaseUS Partition Master. I deleted all partitions on my card. Next I created a new UNFORMATTED partition (just a raw partition). Then I put my card into the microSD slot in my G3 and started the phone. I chose `external storage` option and it worked! I tried the same for internal but it hangs at 20% and gets an exception. So for now until they fix this, I will use it in the old way.
Click to expand...
Click to collapse
I just ran into this problem on a LS990 (Sprint LG G3) and your post gave me a lead on how to fix it.
I didn't have a microsd reader handy so I used adb shell while in recovery and deleted the partition with fdisk
1. opens ADB
Code:
adb shell
2. This shows you the partitions on your device so you can pick out your external sd card
Code:
cat /proc/partitions
3. mmcblk1 was my external sd card, yours may be different
Code:
fdisk /dev/block/mmcblk1
4. P shows your partitions on the device
Code:
p
5. D deletes the partition on your selected device device
Code:
d
6. O creates a new empty dos partition table
Code:
o
7. N creates a new partition and I accepted all defaults
Code:
n
8. W writes new partition table to disk and exits fdisk
Code:
w
9. I then shut down my phone and removed the microsd.
10. Power phone back on. Once phone has completed boot, insert SD card and it'll give you the option to set up the SD card because it's corrupt. This time, choose portable.
**Note: I'm not an expert by any means and this may be completely unnecessary to go through, but this happened to work for me. Use at your own risk**

up any solution in 2016 ??

Lexar 128GB sd card uncompatible with Lineage OS ?

Hi,
I've recently migrated on a S7 because of this sudden great development of Lineage OS, and this as been awesome ! But I had on my previous phone a 128GB 633x Lexar sd card which worked perfectly but as I put it in the Samsung, LOS says it's corrupted. If I try to fix this by formatting as internal, I end up with a timeout and nothing else. For a external sd card there's directly an error 400 with sm formatting it to PUBLIC. I also tried with a shell and sm, and with my TWRP in every kind of way without any good result. Strange thing is TWRP recognize the card when I format it but that's all, I then cannot access it in recovery.
The card had been naturally tested on computers, on another S7 with Stock ROM and I tested other sd card on my phone which worked fine.
Help would be greatly appreciated !
Edit
I've also found that mounting the sd card with a adaptor on the USB port is working perfectly.

SD card stuck on checking

Hi guys,
I have a samsung sm-t520 which I recently resurrected with lineage os 14.1-20190104-Nightly-n2awifi. I think everything installed correctly, but after I inserted my sd card I put it as an internal storage. Later on I honestly don't know what happened, but the card wasn't being seen by the os. I am getting an sd card checking... I just wiped the system, it recognized the card for a second but after I selected format as portable, I got to where I was in the first place with sd card checking stuck. And nothing happens. I tried formatting the card through pc, but it couldn't (unable to format, I even tried with disk manager). There's nothing on the card, I tried to format in twrp but depending what I do it gives me error 1 after failed formatting. I'm not sure what I can do with it. It's a 64gb card. When I try to change the file type on the sd card twrp just keeps working on it and then it reboots to the os normally. (I'm not sure now if it's not happening randomly, really frustrating)
Help much appreciated.

dziech said:
Hi guys,
I have a samsung sm-t520 which I recently resurrected with lineage os 14.1-20190104-Nightly-n2awifi. I think everything installed correctly, but after I inserted my sd card I put it as an internal storage. Later on I honestly don't know what happened, but the card wasn't being seen by the os. I am getting an sd card checking... I just wiped the system, it recognized the card for a second but after I selected format as portable, I got to where I was in the first place with sd card checking stuck. And nothing happens. I tried formatting the card through pc, but it couldn't (unable to format, I even tried with disk manager). There's nothing on the card, I tried to format in twrp but depending what I do it gives me error 1 after failed formatting. I'm not sure what I can do with it. It's a 64gb card. When I try to change the file type on the sd card twrp just keeps working on it and then it reboots to the os normally. (I'm not sure now if it's not happening randomly, really frustrating)
Help much appreciated.
Click to expand...
Click to collapse
Here is a method discovered by another member here to fix a corrupted sdcard that was used as adoptable storage.
https://forum.xda-developers.com/general/help/corrupted-sd-card-adoptable-storage-t3801250
For future reference, adoptable storage has to be reversed before factory resetting or reflashing the device, then you have to go through the adoptable storage setup again.
In my opinion(many others would agree), using adoptable storage or any other similar feature that uses external as internal is not worth the hassle and exposes your important data to corruption very easily. Also, when using adoptable storage, the device will not boit if the sdcard is removed or corrupted. It can even cause the device not function at all.
Sent from my LGL84VL using Tapatalk

Droidriven said:
Here is a method discovered by another member here to fix a corrupted sdcard that was used as adoptable storage.
https://forum.xda-developers.com/general/help/corrupted-sd-card-adoptable-storage-t3801250
For future reference, adoptable storage has to be reversed before factory resetting or reflashing the device, then you have to go through the adoptable storage setup again.
In my opinion(many others would agree), using adoptable storage or any other similar feature that uses external as internal is not worth the hassle and exposes your important data to corruption very easily. Also, when using adoptable storage, the device will not boit if the sdcard is removed or corrupted. It can even cause the device not function at all.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
Thank you for the information. Well, I have worked with Linux last time maybe 10 years ago so I don't really understand what is happening in this post. Is there a translation available anywhere to windows? ddrescue is available on everything but windows from what I'm seeing - great... Also, is there just a way to reset the card so I can use it in an automated way?

Question ROM (10) Suzu AOSP stable on xperia x 5121 does not support my sd card?

My greetings to all,
I have a problem regarding the android 10 AOSP ROM on my xperia x (suzu).
I installed the ROM and everything is working fine if I can say it like that. Except my problem is the Sd card which is not supported. And he asks me to format it. What I did with a message which subsequently states that I can use my card now on the phone. Except that I still have nothing, not even a trace of the SD card in the file manager. Could you help me? I really like this ROM and would like to keep it. If there is a possible solution, please help me. I am attaching some screenshots to messages I got with the SD card. I also specify that to flash the ROM I have to send everything on the SD card and use TWRP to flash it. The SD card shows up well on my computer and the Oreo 8.0 Stock ROM on the phone itself. I have to format the SD card in Fat32, exFat, Ntfs but still nothing. I tell myself that maybe it is the ROM which does not accept the sd card. Ah yes I was going to forget, to flash the ROM, I used the kernel of android 9 pie and I don't have another SD card to check if it works or not with another. I also admit that I am not too good at handling. I just came across a tutorial here that I followed(rom-10-suzu-aosp-stable) . Thank you and sorry for taking so long.