Flash Drive Problem?

I hold a flash memory that stores and plays music. I was installing a software and within the end it required to reset my PC and I forgot to give somebody a lift the flash drive out. Now that it appears to be empty but it in truth has 438 MB within use but it doesn’t detect the files and I can’t store new info on it.

The info is drastically important and I know it’s within but:
HOW TO GET IT?

Answer:
Try using a different computer and see if the files are still there
if they are put them on disk and take them back on the comp that agency If you can't get them that means of access, there are several free notes recovery programs on the internet
U inevitability to setup a system file within the boot sector Or if u can't use any recover softwares ;)

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