USB problem

Sounds like filesystem corruption (or, possibly, hardware damage like one address line on the memory chip becoming disconnected - but that would be a very interesting failure)

(I assume that's a flash drive, from what it probably supposed to be "ADATA"?)

The simple and reliable solution is to throw it away (or otherwise label as unreliable), get a replacement, and load back the files you ought to have kept backups of

FAT32 filesystem usually have two copies of the FAT, but I don't think they have two copy of the directories (which include the filenames), sorry

 

What?! Sounds like some kind of corruption to me. There might be data recovery programs that can recreate now-corrupted data but IDK.
[y did u skip meh @Ryccardo ;-;]

 

@Jamesthinker If your USB gets corrupted again, then you should go and buy a new one.

 

I never seen anyone recover from this File table corruption. (even though FAT32 should have a backup table, they usually are corrupted at the same time? I don't know when the copy is swapped)
it can happen if you eject your device without using safe eject option, or it shutdowns while writing to it (power lost, etc.).
or more unfortunately, the device itself is dying.

 

hdd, SD card, flash drive, etc.
any device using FAT32, once you get a corrupted File Allocation Table (FAT, which store the filename, start position and size of each files stored on the partition), there's no way to recover and you can only format.

if you have a lot of difficulties reading/accessing the drive to backup your files, then it's dying and each time you try to connect or read from it, the less you can do it. format will not help, it would even freeze. in that case, you need to buy another one.