syncthing seems pretty solid to me and I've used it a little, but...<p>There's pushback on the killer feature that I want. I want to be able to sync photos from my phone and clear them automatically so I don't run out of room. I've been told there are ways to do this but they all feel brittle. Syncthing should be in a position to do this safely. E.g., I have 3 destinations and set a policy that photos can be cleared from my phone when they've reached 2/3.
Great tool but has its quirks. Be careful doing cross platform syncing. What's a legal filename on macos/linux may not be legal on Windows (e.g. "?" in a filename) If something slips through it's probably easier just to scrub the broken sync config and start again.