Takes time to be recognized. Each time Windows has to (re) install the driver. Unable to copy a large file after a few minutes it crashes and loses his letter (E :, F: or whatever) and he must leave Partition Manager to recover. Contagious to other USB drives are also beginning to lose their letter. Windows 7 loses the ball! I changed cable, put on another USB port 3 or 2, nothing to do. Windows back to health when I take it off.
