How to remove write protection from usb flash-drive?

See if the links posted 4 posts above your posting help.

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/HELP-how-do-i-reomove-write-protected-mess…

http://www.rmprepusb.com/tutorials/54—how-to-fix-write-protected-disks