As we can see that there are limited application requirements in this case, an ordinary broadband would be enough for the file transfer of daily information to the headquarter. If broadband is not available, dial up internet would do the job.
In my opinion Star Architecture could be another option to use in such situations. Start architecture has a dedicated circuit and it has the capability to route all messages from a central location in a network to client computers.
Explanation:
I no I'd of zoom sorry but thanks u for point