There are so many ways to configure Syncthing; it’s hard to know where to start. It took me a very long time to figure out how to be organised and I still have remaining mess that’s hard to cleanup. This is what I’ve settled on for now.
A folder on every device to send to every other device.
A central ‘backup’ server at home. Receive only.
This has been the missing manual for me. The key thing was realising that actually all devices are mobile and I needed that central server to simplify things, not for technical reasons but for my own understanding!
How did you setup your network?