I have a USB which is read-only protected and I can’t remove the one file that is on the USB, or transfer new files from my computer to the USB. I can’t reset the USB or format it. What should I do?
The standard answer is to return it, either to where you bought it or to SanDisk.
http://kb.sandisk.com/app/answers/detail/a_id/5232/~/return-material-authorization-(rma)-process
But there are other options also. This link may help you:
Sorry to see this for you Jonis. How long have you had this already? 
