My galpal Subtlekate has a great reminder here for all writers. If you read her comments on the post, she also name drops a program that she says is easy to use.
I need to practice what I preach — and I confess I haven’t. But do you really want to lose 13 chapters of your current novel because you didn’t back-up your work? Or lose 100 poems you were gathering for publication? Or lose your daughter’s wedding photos? You get my drift.