Cinders said:It may be toast or it may not be compatible with your external box. Find out the make and model of your drive put it back into your computer (take it out of your external box) and download and run its diagnostic tool.
https://www.techspot.com/vb/topic7602.html
SNGX1275 said:Can you boot from a live linux cd and see if you can get at the data that way? Like Cinders said, what does one of the Drive Diagnostic Utilities say about the drive?