I just got a 3TB external hard drive to store all my movies. I have an iMac and an Apple Airport Extreme. I also have an Apple TV, which pulls in everything from iTunes so I can watch all my movies. Both the Apple TV and iMac access the network via Ethernet cable (no wireless). I need to put all my movies on the external drive because my iMac hard drive is not large enough. My question is, should I connect the external hard drive via USB to my iMac or the Airport? Does it matter? As a side note, I will be connecting a second external hard drive to use for Time Machine backups. This will use whatever connection the first external hard drive doesn't use (either iMac or Airport).