raspberrypi syncthing

Installation and configuration

1. sudo apt install syncthing
2. sudo systemctl enable syncthing@pi
3. sudo systemctl start sycnthing@pi

Autostart: https://docs.syncthing.net/users/autostart.html#linux

NFS share is enabled on router. Then syncthing on raspberrypi could store the files from phones/PCs to the usb drive.