Hello very smart mac people! I have a Mac Pro 2.66 Quad-Core bought August 2007. I have 2 occupied hard drive bays and am looking to fill an additional third bay at this time. My specs say to add as a max drive: 750GB Serial ATA 3Gb/s; 7200 rpm; 16MB cache My question is, can I actually add a larger drive? Perhaps 750gb was the largest at the time, I'm guessing. I want to add 1TB or larger with a larger cache, etc. Is this possible? I'm not using RAID or anything fancy. I'm just afraid if I buy 1TB or larger and it only uses 750gb I'll have wasted money. Many thanks.