I finally hacked my Apple TV today so I can use my external USB drive directly connected to the ATV. The drive is also set as my main storage, so iTunes recognizes that the Apple TV has a 1.5TB drive, and not the factory 40GB. My question is, is it safe to switch off the drive when Apple TV is not in use, or will it make things go "wacky"? I assume that if I unplug Apple TV then switching off the drive it will be fine, but if Apple TV is in stand by mode, is it or is it not okay to turn off the external hard drive? Thanks for your help in advance!