You could use Syncthing just to empty the incoming files from your phone (ingest) and then move the photos via cron to a second folder (also Syncthing) which is

You could use Syncthing just to empty the incoming files from your phone (ingest) and then move the photos via cron to a second folder (also Syncthing) which is just shared with the replicas. Another approach would be to push the files from Syncthing to borg (borgmatic can do replicas) https://torsion.org/borgmatic/ https://torsion.org/borgmatic/