Hey, this is my first post on the forums! I've been looking around this site and others for a way to install a second hard drive in a 27" iMac, and discovered two methods of doing so. Method 1: Installing a drive in the empty SSD drive slot that comes in all iMacs, and either purchasing a bracket to secure the drive. Or securing with some heavy duty velcro. There's slightly more to it than that, this link is where i'm referencing from http://ssd.youds.com/ Method 2: Buying a super drive caddy, and placing a 2.5" hard drive in the caddy. this is the link i'm referencing from for that http://forums.macrumors.com/showthread.php?t=842548 My question is this; Since there are two methods of outfitting second hard drives to the iMac. Would it be possible to have three hard drives in one machine? Or is there some sort of complication/compatiblity issue in doing so? I'm not super familiar with the inside of the iMac, but i'm fairly comfortable taking things apart and poking around. Also; i'm wondering.. If i went the route of using velcro/bracket for securing the drive in the SSD slot. Would i have to install a solid state drive? Or would any 2.5" hard drive do? Thanks for the help, and if this question has been asked before i apologize. But i searched for it, and didn't find anything.