Hi, I have a 733mHz Quicksilver G4 that has a built-in 40GB HD. I want to add another (or possibly many more) hard drives so I can use this computer as a file server and a backup server (if there is such a thing). I read another post saying the biggest HD my computer can take is 128GB, due to the fact it has ATA/66. I am unsure as to whether all Quicksilver G4s have ATA/66, but I can't seem to find out in Apple System Profiler (for some reason). Anyways, assuming I can't install a hard drive bigger than 128GB inside the machine, presumably I can use a PCI card to add more drives? If I wanted to add an ATA/100 drive, could I use an ATA/133 card or would they not be compatible? And will any old ATA/133 card work, or do I have to get a Mac-compatible one? Many thanks!