Nice idea, but for personal sharing between my devices, I have a syncthing folder that's synced between my laptop, phone and media center/NAS, and I've been finding that most of my day to day files have been migrating into it, and I hardly ever use things outside of it.
I also use Syncthing, been using it for many years, it is great
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I have a similar setup. I have my git repos as headless repos in my syncthing folder and use it instead of github.