Well I was just recently trying to create a Pandora stick and I believe I accidentally put mspformat.exe into the main directory with the memory sticks folders. I then realized that the drive no longer appeared on my drive directory on the 'My Computer' screen. So I disconnect and reconnect it and it still nothing. I check to see if it's detected and it is, it's just that I can't access the memory stick's folders anymore for whatever reason. Did I just mess up my memory stick? Edit: Nvm, it was just the computer acting funny.