Process of elimination time:
a) does it work if you plug it into another computer? If it does, the computer is to blame
b) does it work if you plug it into another usb port? If it does, the usb port is to blame
The USB wire malfunctioning is very unlikely.
If it is not the port, and it is not the computer, than it is probably the external hard drive. If you figure out it is the external hard drive, it may be possible to get some information off of it. Just email me at
[email protected] with the results. Don't forget to include the original question.