SteamOS. Outside of Ubuntu and other corp distros, if steam made a mobile-specific os or invested in arch enough to make a mobile friendly UI I would be interested

Or just donate to your distro and vlc

Definitely easiest and most manual, but not “robust” I guess but its hard for it to fail you’re more likely to have user error than system error

4TB mostly TV, then movies, then a distant third is music. Novice at all, tried remuxing a few things that didn’t work. Everything works on jellyfin android and PC. Android TV jellyfin is frustrating, some things don’t play so well

Rsync, termux widget with a bash. Press button and it syncs my photos to my server filesystem