I read that WD told someone that their unit is defective, if that is so then every one posted on this board with the same problem have a defective unit with data is no longer accessible. To me this sounds really crazy! My unit worked for quite awhile then it stopped. My friend got his the same day from the same place and he has no problem. It seems to be that a patch or some type of driver should be available to handle this problem. I will be buying another one, by another company.