What file system do you use on your MicroSD card? - Transformer TF300T Q&A, Help & Troubleshooting

Just wondering what file system most people are using on their MicroSD cards in their TF300. Is one better than the other, and for what reason (outside FAT32 not storing file sizes larger than 4 gig)

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Weird microSD behaviour?

Hi all.
I have done some search in forums, but found nothing simmilar. So, here we go:
I've got myself 8GB SanDisk microSD class 4 memory card.
And now I have some strange behaviour from it:
- I can not copy files to it using Microsoft ActiveSync Explorer (I was able to do copying when I was using 2GB Kingston microSD card).
- I CAN copy files to it using MyMobileR ver 1.23 integrated Mobile Explorer
- camera often shows too small number of remaining pictures possible (at any resolution). Pictures are going to SD card, OFC...
No items are missing from SD card, no directory names are corrupted...
Card is about 65% used, mostly by iGO 2006 maps, pictures, pocket books and mp3's...
Any ideas?
same sd card works fine for me.
maybe your sd card has some corrupted areas?
Bodisson said:
Hi all.
I have done some search in forums, but found nothing simmilar. So, here we go:
I've got myself 8GB SanDisk microSD class 4 memory card.
And now I have some strange behaviour from it:
- I can not copy files to it using Microsoft ActiveSync Explorer (I was able to do copying when I was using 2GB Kingston microSD card).
- I CAN copy files to it using MyMobileR ver 1.23 integrated Mobile Explorer
- camera often shows too small number of remaining pictures possible (at any resolution). Pictures are going to SD card, OFC...
No items are missing from SD card, no directory names are corrupted...
Card is about 65% used, mostly by iGO 2006 maps, pictures, pocket books and mp3's...
Any ideas?
Click to expand...
Click to collapse
I have the same SD card and no problems.
I expect that you are using the Polaris or other equipment that supports SDHC.
I would recommend to format the card using FAT32.

[Q] How do I copy large file to SD?

Anybody has any idea why I'm getting "file is too large to copy" when copying 7 GB file to internal SD on Viewsonic G-Tablet when 13GB is free?
I guess it's becouse it's formatted as FAT32. So how do I exactly get any MKVs which I have which are all more then 4GB to play on my G-Tablet? Can I reformat SD as exFAT or some other format which supports bigger file sizes.
i know after a while of me copying and deleting stuff my available space would get smaller. after 2 weeks of use i noticed this, so i erased everything off of the internal and i was left with 5gb of free space. i reformatted to fat32 and had my 12 or 13gb back.
Issue is not with available space but file size limitation on FAT32 of 4 GB.
artisticcheese said:
Issue is not with available space but file size limitation on FAT32 of 4 GB.
Click to expand...
Click to collapse
ah i see, don't know then :/
I don't think there's any fix, at this time. I read that Froyo's VOLD (which controls the mouting process) only supports vFAT. The previous VOLD at least supported EXT2/3(?) which was helpful for us Linux folks.
This is really a big issue given the limitations of FAT32 and the fact that none of these bozo vendors can agree on a standard format.

Can't access data of external SD after larger file transfers

hi,
i'm using wifi file transfer pro to transfer files from/to my pc. i store my movies and other larger files on the external sd card (sandisk ultra 32GB uhs-1) because of I/O lag.
but after transferring some larger amount of data the external sd card is not accessible anymore until i reinsert it. i was able to copy one 300MB file, the other 300MB file was cut off at about 200MB. sometimes it's possible to transfer larger amounts of data, sometimes no problem at all.
the file system browsers on the tablet still show the files with correct size and let me browse through the directories, but i can't access any files anymore until the sd card is removed.
anyone else having this weird issue? no idea if it's the app or something else, but such file transfers shouldn't kill the sdcard.
What filesystem are you using on this card? Hopefully not NTFS?
no, i'm using fat32 as linux is my main OS and ntfs is always a pain there i guess i have to try to reproduce it again with logcat running.
Might be some problems with uhs-1 support, as it seems to work well for some under the .26 firmware and somewhat worse for others. In fact, logcat might be useful (although I'm not sure if I should say "good luck with reproducing it" ;>)

Internal SD card format causes premature filling

Just a note, my daughter's blaze kept running out of space on the internal SD card. I found 2 issues:
1) The DCIM directory contained a Huge thumbnails file. (200mb) This was always the first thing I deleted.
2) Samsung formatted it as FAT16 and not FAT32. Since apps were storing lots of small files on the SD card, a ton of space was being wasted.
I used a windows host to reformat the internal SD card to FAT32 and things are running much better.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 4 Beta
tronmech said:
Just a note, my daughter's blaze kept running out of space on the internal SD card. I found 2 issues:
1) The DCIM directory contained a Huge thumbnails file. (200mb) This was always the first thing I deleted.
2) Samsung formatted it as FAT16 and not FAT32. Since apps were storing lots of small files on the SD card, a ton of space was being wasted.
I used a windows host to reformat the internal SD card to FAT32 and things are running much better.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 4 Beta
Click to expand...
Click to collapse
I had somewhat of the same problem, thumbnails taking ridiculous amount of space, as well as other cache files. After i did a format of both my internal and external, the phone has been a lot quicker, especially for anything that has to access the sd's and boot scanning of the sd's. Never knew they formatted the internal to fat16? Good info for the beginners though.
I don't understand why it was formatted that way either. But the fix was simple enough. Since its not something a beginner would even look at (I mean how many people remember FAT12, FAT16, FAT32, and vFAT?
Sent from my SAMSUNG-SGH-T989 using Tapatalk 4 Beta

MicroSD Card Problems

I've seen other threads allude to this, but I've been wondering if anyone else has had any of these problems with microSD cars in the Phab2 Pro and know of any solutions?
Things I've encountered:
No exFAT support, so you need to format larger cards as FAT32 (not really a problem per se, but annoying).
All the Samsung EVO/EVO+ SD cards I've tried in this thing do fine as portable SD cards until it exceeds around 10GB, then a re-boot or re-mount claims the card is corrupted. Mounting the card on my PC/Mac shows no problems.
Adoptable storage works for my large 128GB EVO+ card (which made me not return the phone), but I notice that my 64GB EVO card can't be adopted and the error is a weird toast message:
"java.util.concurrent.TimeoutException: Thread Binder gave up waiting after 180000ms" (something to this effect from my recollection).
I should point out that these SD cards have never had problems on other Android devices I've owned, so it seems very specific to this device. Basically, the only workaround I have right now that works for me is to use adoptable storage and that is adequate for my needs.
The Lenovo Phab2 Pro, by default, reformats newly installed microSD cards to a better file system than FAT32. See post below:
Not FAT32
Got my new Samsung 64GB microSD card & installed it in my Phab2 Pro last weekend. First thing, the Phab2 Pro reported that the card was not formatted properly and did I want it reformatted? I did and it did.
Looking now at the newly formatted microSD card with ES File Explorer and with Lenovo's bundled File Manager, I couldn't tell which standard the card was formatted to.
To the point, I plugged the phone into my laptop, navigated to the microSD card in Windows File Explorer and copied a 6GB file to it, no problem. I verified that the copy was successful by disconnecting the phone from the laptop and opening the file in Android.
I don't know which file system the Phab2 Pro uses by default to format microSD cards but I know it ISN'T FAT32. FAT32 supports a maximum file size of 4GB and, since the microSD card supports larger files (after allowing the phone to reformat the card to its default file system), it isn't FAT32.
roebling said:
Got my new Samsung 64GB microSD card & installed it in my Phab2 Pro last weekend. First thing, the Phab2 Pro reported that the card was not formatted properly and did I want it reformatted? I did and it did.
Looking now at the newly formatted microSD card with ES File Explorer and with Lenovo's bundled File Manager, I couldn't tell which standard the card was formatted to.
To the point, I plugged the phone into my laptop, navigated to the microSD card in Windows File Explorer and copied a 6GB file to it, no problem. I verified that the copy was successful by disconnecting the phone from the laptop and opening the file in Android.
I don't know which file system the Phab2 Pro uses by default to format microSD cards but I know it ISN'T FAT32. FAT32 supports a maximum file size of 4GB and, since the microSD card supports larger files (after allowing the phone to reformat the card to its default file system), it isn't FAT32.
Click to expand...
Click to collapse
Any idea what file system Windows thinks it is? I didn't think it was exFAT since a fresh format of exFAT from Windows gets the "not formatted properly" message.
I've since given up on this phone--too many problems for me to tolerate. I really wanted to like it, but alas, when my three year old Z Ultra behaves better, I just can't justify paying this much for it. Maybe I got a lemon.
kumodog said:
Any idea what file system Windows thinks it is? I didn't think it was exFAT since a fresh format of exFAT from Windows gets the "not formatted properly" message.
I've since given up on this phone--too many problems for me to tolerate. I really wanted to like it, but alas, when my three year old Z Ultra behaves better, I just can't justify paying this much for it. Maybe I got a lemon.
Click to expand...
Click to collapse
You have two formatting choices for microSD cards with the Phab2 Pro. You can choose to format the card as "portable storage" or "internal storage".
I just put in a 64GB microSD card and had the phone format it as portable storage, I then ejected it and mounted it in Windows and the Disk Manager tool reports the card as formatted as FAT32 (see attachment).
Installed a SanDisk 256GB card model (SDSQUNI-256G-GN6MA)
Let the phone format the card, choose internal storage, then it asked to move files, pics and apps to the new card, I clicked accept.
It worked! Phone reads the card, so far no issues, see attached pic.
128GB or 256 ?
Hi,
you said in the last message you have a 256GB card, but i have seen the phab 2 pro take 128 and no more. I have the 690M model.
256 or 128 GB ?
Thanks,
Philippe
I have the 690Y and took a chance to see if the 256GB card would work and it does. That's why I listed the model number of the SD card. Even though Lenovo states on their website up to 128GB, it looks like it's​ a hit or miss on which card you use as others have posted.
Hi,
Thanks for your answer. The 256G is to expansive so i took a 128G (SDSQUNC-128G-GN6MA). It works fine.
Philippe
Hi please help me!,any brand of sd card it shows corrupted,but if i tried to other phone it worked. What will i do?

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