Re: Some Kanguru external hard drive questions

 
A simple approach: do differential backups to DVD-R or CD-R and buy a
bunch of cardboard CD mailers from ebay.  These are self-sealing and
simple to use.  Get a friend in some other state to let you mail him a
CD/DVD once in a while, and he saves it in a box or on a spindle for
you, and you do the same for him.  Do this with multiple friends in
multiple states/countries if you're really paranoid.