Hello, I currently have a G4 Mac Mini as my media box with a couple of 500gig WD MyBook Premium hdd's attached to it (on the firewire bus) for movies etc etc. Now, I know that the WD MyBook range automatically power down when not in use, this is ideal as the mac mini also goes to sleep when not in use and wakes up when I want it to, so do the hdds, if i'm only accessing data off one of the drives, it doesn't wake the other. Anyway, after converting my whole dvd collection to h.264, and started to encode our family home movies from vhs/dvd/betamax (oh god the horror!) i've run out of space yet again, and it looks like i'll need to get at least another 2 500 gig hdds. I'd like to go down the route of getting more mybook premium's because of this sleep and power management features however they're a bit costly down here. My question(finally!) is, if I get external hdd enclosures and i set in the system preferences>energy saver to power down hdds whenever possible, does that mean it will also power down external hdds? or internal only? I don't want to be in the position of having to manually 'turn off' all the hdds one by one when they are not in use as this is in the family room and my parents, (75 and 66) have just managed to understand how to use frontrow and the plasma! Teaching htem to turn off individual hdds, not to mention the wear on the drives being on all the time is not really an option. Thanks in advance!