When you open the "My Computer" Icon and you see the drive on the list, try right clicking on it and go to properties. Try to find a check box on the settings that un-writeprotects this drive. If you can try a re-format.
I have a sandisk 1gig flash mp3 player that was working properly, but now I cannot delete or modify files when it is connected to my computer (I am running xp, and its connected via USB 2.0) When I try to delete files I get a message something like disk is write protected please change protection, but I cannot find where in the flash drive to change. Please help.