My Performa 630CD question is: What size limitation is the HD? I have the original Quantum 250MB ATA still in there, found some old SIMM RAM at work for a total of 12MB. rescued a ZIP 100 SCSI also from work, all this stuff was heading for the trash. But they said if you can use it take it, which I did. Now I want to upgrade the HD. Now I have 2 external SCSI Zip drives, but the HD is lacking in terms of size, any suggestions.