I’ve just started using InSync for the first time to try this probably the best solution available.
But I have encountered an important problem on the first day:
If I delete a file locally, it’s also deleted remotely, BUT if I add or move a file (somewhere else in the local Drive directory) nothing happens So this file is not accessible either via web browser or another device.
After logging out and back in, the problem disappeared. InSync is now constantly on watch and instantly updating the remote with any such local modifications