It’s a fantastic app, but doesn’t do sync like SyncThing or Resilio Sync.

It can do things similarly if you work at configuring it, but it can never monitor a remote and sync based on file changes there. That’s not a criticism, it’s a function of the file system approach it takes - it can sync with many different file systems, but it doesn’t have a client at the other end - it simply interfaces with that file system. Fantastic actually.

I’ve used it since about 2010, it was my solution for moving files back and forth for a long time. I still use it for specific things, but I’ve put more effort into ST and Resilio Sync config and management because they’re full-on sync suites.