Seagate expansion not showing up on my computer!

MrsM

Honorable
Nov 2, 2013
8
0
10,510
Hi all. As stated above, the external hard drive is not showing up. I can't find it on the device manager either. There is no safely remove option so I'm a bit hesitant to just remove it from the back on the hard drive! The external is still making a noise and the blue light is on! I have no idea what do as I'm no whiz on a computer. Any help would be greatly appreciated! Thanks in advance. My system is windows vista if that helps..?