How to organize file system synchronization in 2TB between several computers?

Question

Data synchronization

Hello, I am a photographer and I need the safety of a file archive. While everything fits into 2 terabytes. There are several computers, now I make backups to a USB box once a week and physically connect it to all machines. windows and ubuntu systems.
Requirements:
1) Files and folders must be undamaged due to crashes. Having suffered with cloud services (when the current file is overwritten with the old version or files are duplicated), I feel real paranoia for the safety of projects.
2) Settings for limiting traffic by time of day.
3) When files are moved within the disk so that they do not fly over the Internet.
While I'm looking at the syncthing program. Write who uses it. Thank you!

Answer 1

For several months I have been synchronizing a family photo archive (about 200G) using syncthing - it works, there are no complaints.

Answer 2

git-annex and a couple of VPSs in different parts of the world.