I recently added another 2tb Western Digital MyBook external USB drive to my PowerMac MDD, the sixth such external drive on my system, and I'm seeing some strange behavior from it that I have not observed at all with the other drives. It's little white light flashes a lot, on and off, when I'm not writing anything to it or reading anything from it. So I start up Activity Monitor, and I'm seeing writes to disk and reads from disk as that light flashes when I'm not doing anything at all on disk, which I find most curious. Now I can see that there would be a certain amount of device polling going on, and that makes sense, but what is being written to that disk when I'm not even using it, and what's doing those disk writes? I have no idea, and it appears to be happening on this new drive, but not the others, and I can't imagine why. There are about 700 movies on that drive, but no program files at all. This is pretty weird. Anyone know what might be going on?