Hi Darryl, bright blessings to you. Sorry I forgot to check back for replies! OneNote is a cloud storage service, so it’s all backed-up online. The other advantage with that is I can access it from anywhere. It’s free to use, you just need a Microsoft account. I’ve been using it for years to store all my ancestry research notes and pictures.
Of course anything really important it doesn’t hurt to save elsewhere, maybe download and put on a USB drive or something, for added security.