I have had a Western Digital My Book (Essential Edition) hooked up to my macbook (albeit on and off) for over 5 months. However, I also had a partitioned section solely for my PC. This worked fine for ages. Until the other day, my mac just stopped recognizing it. My windows PC still shows up the "windows" partition formatted FAT32??? if thats correct. But the Mac partitioned sectors, formatted as Mac OS Extended (Journaled) are not picked up by my mac any more. Proper strange! It worked flawlessly for ages. Thing is, Im reluctant to send it back to play.com (where I purchased it) cos they say they check each item, and technically, it does work, just not on my mac :S Help? Ta!