I have a Seagate 320GB and it was working fine for a while but it got stuck while copying files to my new Dell laptop on windows 8. So I had to remove it to stop it. When I reconnect it, it made some sound and it doesn't show up in Windows explorer. I can see it in my notification.I used the "troubleshoot" help and the message was that " the device is using usb 2 and my laptop has usb 3 port. " When I connect it to my old laptop, the same problem, so now I cant access it at all.