Syncthing for Android is now discontinued. This is an alternative process that achieves the same outcome.
- Sign-up to Wasabi or any other object store service with no ingress/egress fees;
- Configure rclone in your computer(s) and server(s);
- Configure rclone in your Android phone
- install Termux
- install git and go from Termux itself
- clone rclone from the GitHub repo then build it
- install the Termux:Tasker add-on
- Log into Wasabi console and create your bucket(s)
- Add the bucket(s) as your remote location to rclone on each device
- Write the rclone commands that make sense to your synchronization strategy.
