What does Windows show when you plug the drive in?
The Formatter Silicon Power V.3.7.0.0 -PS2251-.zip is an indispensable emergency tool for any user experiencing a bricked or corrupted Silicon Power USB drive with a Phison chipset. It is simple to use, portable, and powerful. However, it is a weapon of last resort—it will fix controller glitches and write-protection errors, but it does so at the absolute cost of all data on the drive. Formatter Silicon Power V.3.7.0.0 -PS2251-.zip
Back up any data if the drive is partially readable (this tool erases everything). What does Windows show when you plug the drive in