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I used the A1260 hard drive replacement guide to swop out a Western Digital Scorpio SATA (WD3200BEVT) 320 Gig 5400rpm for a Western Digital SATA (ST9750420AS) Momentus 750 Gig 7200rpm. (http://www.seagate.com/www/en-us/product...) The whole operation went flawlessly thanks to the guide. The improvement in speed / access with the bigger, faster hard drive is very noticeable. Just to let people know that the installation of a 750 gig drive is an accomplished fact in a A1260 series MacBook Pro.