Help with external drive

[RobertD63]

I figured a video would explain it better than I can type it..
http://www.youtube.com/watch?v=UtbNNLfFDGc

[mynameisraj]

Try repairing permissions, and if that doesn't work, then try it on a different computer.

If it still doesn't work, your only option is a reformat - it could very well be a corrupt drive - did you drop it recently?