I recently purchased a USB drive in order to up my storage capabilities. I plugged it in and formatted the drive and got the message that it was formatted and met the required performance standards. I moved some of my saved games to the USB device to free up hard drive space. Afterwards, I put in a DVD to watch. It loaded and began to play, but then a message popped up telling me a required storage device had been removed and the xbox would restart. This happened time and time again. The only way I could get the DVD to play was to go to settings, click on my different storage devices, back out, eject the tray and then close it and then the movie would play no problems. If I don't do this, I continue to get the message. Any ideas on why I am getting this message and what I can do to make it stop?