Syncthing is probably the best sync software on market right now in my view. I have had very positive experience with it. I have an always on device that runs

Syncthing is probably the best sync software on market right now in my view. I have had very positive experience with it. I have an always on device that runs various applications including syncthing. Works great and sync is fast. Like send a movie from a computer to phone, and it gets there fast. I have started to use encrypted folders (beta feature). If you have a VPS, this might be a useful feature for you. I like that the transfers are peer to peer, and syncthing has been very secure so far.