undetected external drive

[yozzer2001]

have put an old 2.5 inch hard drive out of an old mp3 player in a usb external enclosure, but when you plug it in to usb port you get the noise and the usb mass storage device attached message but the drive doesn't come up in my computer?
any ideas ,could it be the drives just bust(you can feel it spinning if you hold enclosure)

 

[yozzer2001]

well thank you very much ,i will endeavor to remember this in future.
it now works a treat