@three_jeeps - All of these suggestions are good for backing up your data on Volumio. I would also mention that if you have the deprecated “Virtuoso” or the newer “Premium” MyVolummio account your data is saved in the Volumio cloud. When I transitioned from V2 to V3, I was delighted that all my playlists and webradios were all restored automatically after logging in - very nice!
Also, in V2 there was a Backup-Restore plugin that was basically a UI front-end for the same copy and compress things people have suggested via SSH to your system. I performed an entire SD backup of my new installation, then manually installed the V2 Backup-Restore plugin. Seems to work just fine, and hopefully someday it will be updated and posted to the V3 plugin store. The instructions for manually installing a plugin require a bit of Linux facility, and the moderators suggest you only do this if you know what you’re doing. Anyway, here’s a link to the V2 plugin download, and you can find on the forum how-to install a plugin manually. But you’re on your own