So I purchased a WD My Book Mac Edition USB 1TB Drive a couple of weeks go for my Mini. It worked fine for about the first week. I copied a bunch of files over and all was right. Then, one day I noticed that it disappeared from my volumes list. It doesn't even appear in the System Profiler as a USB device, though the drive's light does power on when I connect it to the mini. I've been trying to figure it out and have had no luck. I've tried different USB cables, connecting the drive directly to a power outlet instead of going into the power strip. I can connect it to my MacBook Pro 2.2GHz running the same OS version, and it mounts right up and seems to operate fine. Nothing I've done so far has been successful in getting the Mini to see that the drive is even connected to USB. Any suggestions? WD doesn't appear to have any firmware updates for my model drive (WDH1U10000AN).