My uni lab has subsidized an iPad for study, so I am using it primarily for handwritten note-taking.

After a while, I figured I cannot easily transcript all of it into notes on laptop. Especially, the hand-drawn diagrams take way too much effort to translate into TeX diagrams. Since these notes are quite important to me, I want a proper backup solution.

I am using Goodnotes for note-taking. How would I go with backups of the Goodnotes files? Of course I could use iCloud, but I want to avoid it for privacy reasons. Preferably, I want self-hosted backup options. What are the good backup solutions in this case?

Thanks in advance!