We used a backup pc to save data originally and then I moved over to shadow protect which is good but we are now going to move to
Carbonite.
$54 a year for complete peace of mind and no hassle recovery regardless of disaster.
That price is the same irrespective of the amount of data saved as well.
Carbonite only works when you are not. You can retrieve one file or a whole backup to your existing or new pc and all data stored is double encrypted so you are the only person who can ever access it.
Check out their 'How it works' tab for full details.