ok so i've had an WD My book 500 GB external for about as long as i've had my macbook about 1 1/2 years. No trouble with it at all. until yesterday. At some point either the power got cut or the cable was pulled out incorrectly it got disconnected from the mac. thus resulting in it not mounting now. I've tried disk repair and shutting down the macbook and restarting...plugging in after everything is started. but to no avail. I am a photographer and about 25% of my photographs i don't have backed up anywhere else. so if i can't get it to work...i'm screwed. I need some way to get the information off and reformat. or get it working correctly. any ideas? I would love to buy something like "disk warrior" but i'm poor. so if thats what i have to do i will, but free is better thanks for your advice.