Can I use Migration Assistant if I have to transfer my files from an external drive to my new iMac? My mother board on my old computer is not working properly. It fried four external hard drives before an Apple Genius at an Apple Store figured this out. I have transferred all of my important files onto a new external hard drive by way of USB 1.1 - very slow but its done. My external drive has USB 2, Firewire 4 and Firewire 8. If this way of transferring files works then does anyone know how I can get instructions on how to do this?