My mom's machine constantly runs out of HD space and she's getting fed up with it. I keep reading about how people are replacing the HD in their laptops to something larger and I think that would help her out tremendously (she has an external but usually needs the files on the laptop too) She's got the 1.2ghz Powerbook G4 that was purchased in May of 2005. It currently has 100gb of space. I think something in the 250gb range would suit her well but I don't know what can/can't go in there (im not HD technical). Im about to head to a meeting or i'd do the research myself...can I ask my Mac Shack peeps to assist with what will work and where I we can purchase one from?