I am having the same problem..computer is showing that its there but says its 'unaccessable'...access denied. a few days ago, my computer got turned off due to a power outage. when I turned it back on, the mybook was deleting itself.....It worried me, and it wasn't showing up on my computer for a little bit. eventually it was back on and had backed itself up. Now again after another power outage, it deleted itself and now its just at a stage where its saying access denied. sorry, I don't have a solution, I'm just like you, looking for answers. I had so much data on this, please don't tell me that I've lost it!