I use Syncthing for this. I have a computer that I use to play podcasts, and the subscription list (a file) is synced to my main computer, so I can edit it fro

I use Syncthing for this. I have a computer that I use to play podcasts, and the subscription list (a file) is synced to my main computer, so I can edit it from there. Syncthing is also on my Lineage OS phone (until my Librem 5 arrives) so I can have a shared Downloads folder. In the past, I used it to sync a subset of my music collection to my work computer. It's reasonably usable for a geek.