but I don't believe you will find a 500GB ATA drive in the 2.5" inch laptop size.
320GB is the largest size drive you will find in that configuration.
Take a look at this site for choices of replacement internal hard drive for your G4 laptop
I am looking to upgrade the original 60gb hard drive in my powerbook G4 17" 1.33 GHz Aluminum - Model A1052. I want to put in a 500gb drive but am having trouble finding one. I believe I need an Ultra ATA 2.5" wide but am not confident about that. Can someone counsel me in the right direction?