- Windows, Right Click, Format, Both normal/quick format.
- HDD LLF Low Level Format Tool
- HP USB Disk Storage Format Tool
- Someone said it may work after put it in a freezer for a while. Who knows.
- If it is a flash card, you may try to format it using a digital camera or mobile phone.
Anyway, if you succeed in repairing your USB flash drive, it may be a good idea for you not to use it for storing any critical files in the future.