Backups

I write it down lest my memory fails me, then I type it lest the paper is lost or burnt, then I save it on a hard drive lest my device is ruined, then I print it out lest my hard drive is stolen, then I memorize it lest the paper is lost or burnt... what a vicious circle! Technology is great but not infallible, at least no less than the manual or the old ways;  otherwise, why do you need all those backups?