I have a Seagate 2T USB 3.0 HD and about once a week after comming out of sleep mode I get a box that asks me to scan drive for errors. The first couple of times I scanned it but never found any errors. It takes a couple of hours to do. It also changes the drive letter from E to F. I go to Disk management and change it back. What a pain in the butt. Could this be a Windows 7 problem or a HD problem? I have the latest 3.0 drivers installed.