how can I get my files off my externial drive that wont show up on my computer
if you cannot get it working open it up. It has a regular HDD inside the case.
This happened to me. I opened the drive case, removed the HDD and installed it inside my computer. It came up.
That option would work if the external hardware failed, not the HDD.
If the HDD failed you would have to send it into a special group to take the platters out of the HDD and get the data off for you. this option is very expensive.
Try to remove the HDD first though.