New answers tagged file-system
You should probably mount the SD card with a USB reader in the PC, to see if the SD card or filesystem is damaged. I had that issue a couple of times and it was that the SD card was actually corrupted or broken. So, a filesystem check might fix it or you will know that it needs to be replaced. In Linux, you could check the filesystem with fsck.vfat. It ...
Press the overflow menu button in the upper right. Select the show storage option. There will now be a new item below the Recent menu item in the slide out drawer for the devices storage.
You can use fdisk via busybox on a droid. So, assuming you have the busybox binary on your rom, and it's on your path, the command would simply be: busybox fdisk [the various fdisk options...] example busybox fdisk -l /dev/block/sda
This worked for me on Moto X Play (6.0.1), stock ROM, unrooted and may be of use to others I wanted to remove the password set earlier for a different reason In USB configuration, I entered the previous password, in Enter your current full backup password and left blank in both Enter a new password for full backup here and Re-enter your new full backup ...
Apps installed on the SD-Card are stored in the ".android_secure" directory. You cant see the APK files directly in that folder because the it is encrypted to prevent direct access to the APK file of paid apps.
Answering the question, the filesystem used on standard Android devices is "exFAT", which is available from Windows Format application and Android's own filesytem management tools. Hope this cleared your doubt.
As of today (May 30, 2016), the F2FS file system doesn't support shrinking. If it does by the time someone reads this, just let me know in the comments. The solution is then to delete and re-create the entire filesystem for /data. From this related answer on Unix & Linux Stack Exchange: mkfs.f2fs /dev/block/mmcblk0p36 11583168 This will do the trick. ...
I finally fixed it. In case someone has the same problem in the future, here's what I did: After googling here and there about how to completely wipe an Android phone, I read that to do that you must encrypt your data first and then do a factory reset. So, I still don't know what caused it, I only know that now it's fixed.
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