16GB Ultra flash drive is write protected

I loaded several files into the drive and removed it after shutting down.  Now I cannot add or delete files and the error message is that the drive is write protected and to remove the protection.  How is that done when I can’t access the drive.  I’ve tried reformatting and sharing the dirve, but I get the same message.

It’s broke.  Return it to where you bought it or to SanDisk directly.  You need an RMA for the latter.

http://kb.sandisk.com/app/answers/detail/a_id/5232/~/return-material-authorization-(rma)-process

Correct. I just hope you still have warranty on this. Shouldn’t be “write Protected Issues” have extended warranty period? Just saying.