I looked through some previous posts, but i am quite confused now, so hopefully someone can shed some light on this. I am going to replace my internal HD in my PB, and use my old (60gig) HD as a backup drive in an external enclosure. This is what i think i should do: 1) Put new HD in external enclosure 2) Use Carbon Copy Cloner to make a boot-able image onto the new HD 3) Attempt to boot off of the external HD (to make sure that it is boot-able)??? (not sure how to do this exactly) 4) If #3 works, then install the new HD into my PB 5) Put old HD into the enclosure and use Carbon Copy Cloner to make a boot-able image onto it (will be my "permanent" backup) 6) Use extra space on the old (external) HD for extra storage. I think this is what i have to do. One other question, when i make the boot-able copy on the old hd (once it has been removed) do i need a partition to store other files (.doc, .mp3, etc.) on it, or will it be fine as is? This is the first time i have ever done this, and i really want to know exactly what i should be doing! Thanks!