I'm on Android, and Syncthing is pretty seamless once configured. I just configure my cellphone, my laptop and my desktop to sync a specific directory in both d

I'm on Android, and Syncthing is pretty seamless once configured. I just configure my cellphone, my laptop and my desktop to sync a specific directory in both directions. It's decentralized, end-to-end encrypted and does local discovery of devices on a LAN so it will also works offline. As long as one device lives and is synced, I have a copy of the files.