Also using Syncthing. It was pretty simple to setup. I’ve been using it for syncing emulator saves mostly but also started using it for steam games that don’t have cloud support.
I’ve had zero issues and the syncing can be set to a low amount of seconds so it’s basically in real time. No need for the app to close and then sync. If I save while playing TOTK, I can see it on PC immediately.
Barrier KVM RustDesk Bitwarden