I have a 160 GB iPod classic and it isn't full yet, but it's close. The disk on my iMac is close to full, so I'm getting a message that says "Disk is almost full, must delete files before adding more" - I'm paraphrasing, as you can imagine. Anyhoo, I have deleted all my duplicated tracks and I have about a hundred CDs sitting here waiting to be added to my library. I understand I can copy all of my music to a larger external drive and then switch the location of the files in iTunes to the external and that should work in terms of taking the stress off my startup disk and allowing me to get to 160GB worth of music on my iPod. So - two questions: 1) I have the external drive, but then I noticed my iMac only has 3 USB outs. Since I'll neec my mouse, keyboard, external drive and ipod dock all connected at the same time, can I use a USB hub to solve this problem? If so, can I attach both the dock and the external drive to the hub? My caveman brain seems to imagine a traffic jam in there... 2) Conversely, as I only use this mac for iTunes (we are a six computer household), can I delete unneccessary program from the iMac and not have to rig this external drive as my library? If so, what are those programs? Thanks in advance!