Hi there, would really appreciate some help with something I'm replacing the hard drive in my Intel iMac 20-inch early 2008, however i'm unsure about cloning my hard drive to my new one. Does my mac contain the capacity to store two hard drives? if so i presume i can boot on the old one and clone like that. Also, is it possible to clone my hard drive to an external USB hard drive, and then boot off of that, thus clone that to my new one? As i really can't afford a USB drive adapter.