Backups are important. I’ve had several drives spontaneously stop working over the years and had I not had backups my children would not have cherished memories of their childhood. I’m so paranoid that I have backups of the backups of the backups. And if you think it won’t happen to you, here’s a little story about how how Pixar almost deleted Toy Story 2.
So go backup your stuff. Right Now. Seriously.