pretend I have 2 hard drive... internal is the primary and external is the secondary. is the internal primary the one that will effect the system? that will effect the how fast it read? know what im saying? and pretend I dont plan to have 2 hard drive... pretend I just buy a new internal hard drive and throw my old hard drive away... can I transfer all the stuff from my old hard drive to my new hard drive? and how di i transfer it? using usb?