Just do it.
Take it from.
Today I lost all the data from my laptop which caught a virus after I borrowed a USB to help print a document.
Of course the work I have written is replacable with a little effort but, as I only backed up a small number of the near 1,000 pictures taken of the little one since his birth, I'm going to be missing lot of baby photos from my son's first year.
I'm not one to be overly sentiment but I was looking forward to going through them with him when he is older. Digital camera and seemingly endless digital storage enables parents to keep all kind of photos and videos of children - something that I can say, at the grand old age of 27, "didn't happen in my day".
This may in fact be music to his ear's as the by spearing him hours of agony as his dad goes through seemingly endless baby snaps which are a little over indulgent for him.
Either way I've learn the hard way and will be investigating back-up options. Expect to read something about that sometime soon.
Ironically I'm working on a cloud computing article, a concept of storing documents online - a concept which leaves documents unaffected by virus on computers.