I like the approach drive takes, but if you are looking for full automatic sync, there is also InSync https://www.insynchq.com/ https://www.insynchq.com/ (linux

I like the approach drive takes, but if you are looking for full automatic sync, there is also InSync https://www.insynchq.com/ https://www.insynchq.com/ (linux client available; I've installed it from the AUR for example).