@scottslowe beyond network file systems, maybe webdav is for you. it can be configured to traverse firewalls. and then there is also unison, syncthing or the cloud productivity tooling that eliminates the need like immich, nextcloud etc.
@kdieter Unison and SyncThing are in my toolbox for my own systems, and they work well. I may need to get some sort of self-hosted file sharing solution going to ease collaboration with my wife, though.
@scottslowe @kdieter for a file sharing solution, I’ve always liked seafile. Think open source dropbox.