I have a Seagate SATA 1TB HD I pulled functional from a Windows 7 system. When I connected it to my Toshiba Laptop with a SATA to USB adapter, also running Windows 7, the drivers installed, but no drive in Explorer. The device shows in Devices and Printers as "External", and Properties says the device is operating properly. Drive Manager shows the drive as present but Invalid. I ran Seagate's SeaTools diagnostics, and it could access the drive just fine, all tests passed. A smaller 160GB Seagate HD on the same adapter connects and reads just fine. Any suggestions to resove this would be fantastic, I really need the files off this drive!