I would like to get "all" my files on an external hard drive so that I can change machines and still have access to everything.

Being prudent, I would also like to back all this data up. But I would just as well NOT buy a second drive.

So! Can I back up the HD to a computer. Perhaps even alternately to the two machines I principally use.

So the question is, can rsync back up FROM an external drive to a computer? And, if so, how? Or can perhaps BackinTime do so.

Thanks in anticipation of some needed hand holding.