cgsecurity.org

I have corrupted RAW USB flash drive that is listed as 0/0 space in computer manager.I tried using TestDisk to repair or retrieve the files but this is what I get while trying.Used PC/Intel settings

It has very important files, please help.
I'm inexperienced with data recovery so please be kind.

Try Quick Search and if no partition is listed, Deeper Search. If it find your partition, set it as P(rimary) and on next screen, choose Write, confirm, Quit.
If it doesn't work, use PhotoRec.
For more details, feel free to read https://www.cgsecurity.org/testdisk.pdf
Good luck