Hi
Make sure you plugged the usb cable on a usb port located on the back of the computer (if desktop) or directly to the usb port if you have a laptop. Plug the power adapter directly to the wall socket.
If the drive still don’t show on My Computer go to Disk Management ( Start > right click on My Computer, click on Manage, on the computer management window click on the second option from bottom to top Disk Management).
Verify how the drive is showing if the drive is Healthy then the drive is fine and the problem is on you OS, but if the drive is showing as a raw partition or unalocated you will have to format it.-
