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I'm using a full 2GB USB. Now it is automatically write-protected. I can't delete, add file or format the USB. I always safely remove before removing it. I have tried both editing regedit and diskpart as instructions on the internet. I have also scan it with a trusted antivirus. Please help me. I'm thinking of a person blocking my USB for money :(. Thanks for your help. P/s: the drive's type is currently FAT.

marked as duplicate by bwDraco, fixer1234, DavidPostill, techraf, mdpc Sep 20 '16 at 0:32

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  • I don't think the USB is corrupted. I can still open the drive, see and open files – Uahnbu Tran Dec 1 '15 at 12:32
  • … which it the perfect definition of 'triggered the firmware write-protect mechanism'… which is irreversible. – Tetsujin Dec 1 '15 at 13:08

It sounds like your USB's firmware has gone into write-protect mode automatically (for some reason). Short of buying a new USB and copying the files onto there, there's really now much you can do at this point. :(

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