Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
This is an action that does not need to be done and should not be done. Backups must go on a your own personal backup server in your own basement, not anywhere in the cloud.
I think where an individual saves their files is up to the individual. Back up to the cloud, back up to external HDs, that's a personal choice. And some individuals choose to do a combination of those.

Either way, it is not a server-based application.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.