Why File transfers between some computers in the office are slow?
The slow file transfer speed can be caused if Brosix can’t establish a peer to peer connection because of a personal firewall and therefore initiates the file transfer through our servers.
If you have a personal firewall on your computer, please disable it or create an exception for Brosix to be able to communicate.
You can also check
https://help.brosix.com/low-file-transfer-speed/