I plugged one of my external drives in via USB and it will not show up. I tried the drive on another computer and it shows up there, so not an issue with the drive itself. I have tried all three USB ports on the front of the computer, same issue. I have run windows troubleshooter, rebooted, still the same. I've uninstalled the disk drive via device manager, still the same. It does seem to show up under disk management, but that's the only place I can see it. It was working fine a few days ago when I ran backup. I am unable to run system restore for some reason on the machine, so that's not an option.
Any help would be greatly appreciated.