Yeah, I didn't upgrade right away either but was doing a portable copy as well as 320 and filled up the 40GB HD after the first week and only got through about half of my cd's. The bad part was that I had no clue on how to copy the original drive so once I upgraded to 120GB I had to start all over again. I think you'll really like this thing. I wouldn't trade mine for anything and the portable feature is awesome (even though you are not using it). The rebooting at first seems to be a hassle but once you get used to it it's not that much of a nuissance.