I have a 1tb Silicon Power external hard drive. I have Windows 10. Two days ago, it was working fine. I tried to plug it in yesterday and it does not show up under My PC. It shows up in the Device Manager under Storage Controllers, instead of under Portable Devices like my other external hard drives. It also does not show up under Disk Management. The light on the device lights up and I can hear it spin up. Under Devices and Printers it shows up as the Usb Attached scsi (uas) Mass storage device which it did not do previously. Before yesterday, I had never even heard of the usb attached thing. I have had the drive for approximately 2 years.