Currently I have everything important to me and my wife backed up on a western digital hard drive on a 4th PC and then re backed up on two file sharing sites set to private.
When I was a novice to the PC world and just thought, "Oh, all PC parts are created equal." we has 2-3 hard drives crash on us losing hundreds of documents and papers. The cost to have that recovered IS NOT fun.
Having a data crash like that is one of the worst feelings in the entire world.