I loaded Itunes music on a seperate external HD when my library had become too large. If you go to Apple support and type it in, you will get the step by step instructions to do this. It's not hard, just a few changes on some menus on the Itunes program and some time to copy your music over from your computer HD to the external HD . The more music you have, the more time it takes. Also if you files are big, like lossless files, it may take a long time. Remember this; Once you have completed the transfer and all your music is designated to the external HD you will not be able to access your music library while your external drive is disconnected. You will see the Itunes icon on your computer, but once you open it, it will be looking for that external HD where your music is stored!