One of our users turned in a Lexar JumpDrive 2.0 Pro on her last day and I wanted to format the drive to ensure there wasn't any client data left on it. I noticed a very small opening in the side with a switch but didn't know what it did. I found this post on tek-tips thread602-1138955 and it turns out this little switch does write protect the drive. The hole is so small, unless you were looking for it you may never see it. I had to straighten out a paper clip in order to flip the switch.