Recently I encountered a problem in my TRANSCEND pen drive .
I was neither able to copy things into it nor format it.Whenever i tried doing them i get this error.
I tried command prompt to format, tried to edit the registry to remove the write protection (source from google ), recovery tools etc…but all in vain.
Solution:Finally i found this app which is a low level formatting tool and in 15 sec my problem was solved :)
Google it as “Hard disk Low level format tool” .
Install and format any type of USB drives .. :)