I know there are other threads on this, but none of them seem to address my particular problem. I recently bought a Western Digital 1TB My Book Home Edition to use as my Time Machine + regular back up drive. Mostly ok, fast, quiet. Problem is, the dratted thing has its own "sleep" function. When it goes to sleep, it dismounts and the only way to get it to mount again is to manually turn it off and back on again. Fairly annoying. Searching the internet tubes, seems this is a very common issue with new WD external drives. Also, there doesn't seem to be a solid answer for the problem to date, and WD so far hasn't expressed any interest in fixing it. Given this, I think this puppy is going back to Best Buy! If anyone knows of a fix for this problem, please let me know. Otherwise, what external Hard Drives would you recommend, (please something without sleep issues)! Note, I also have a 3-4 year old Maxtor 1 Touch I bought at Best Buy that has been flawless, ( except for the aircraft landing light it uses as an LED). Would probably get one of these, but no one seems to carry them anymore.