Samsung 650GB External Hard Disk Not Being Detected

I am having a 650GB Samsung Hard Disk. Once I was transferring files from the hard disk to my PC and lights went out. Now when I connect my hard disk it is not being detected though it shows up in the Disk Management menu. I have tried formatting the HDD but it shows time remaining as 300 hours so I had to stop it midway. Is any other solution available for it...??? Please help...!!!
 
If you feel confident enough, Open it up and remove the hard drive from inside the enclosure and fit it directly in to your pc.

This will help determine if the hard drive or enclosure is to blame.
 
Well that depends on whether its the actual hard drive inside the case, Or the case itself.

A new case costs very little:
http://www.amazon.co.uk/tag/hdd enclosure/products

A new hard drive on the other hand is more expensive and it may be more cost effective to just buy a new external and save the hassle.

If you are not comfortable taking it to pieces ask a tech minded friend to help, And test the actual hard drive without the enclosure to determine which has failed.

 
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