If I had to do this I'd sync using any number of sync apps and maybe AutoIT to automate the work.
As this is a small business I'm sure you have staff for the IT stuff. The scripting is very entry level but I can't write yours since I've yet to find two networks to be the same.
I have a small business and currently I have 3 computers( Win10 Pro) on a Gigabit network. The network is wired (CAT6) connected to a Gigabit Switch. I would like to have a suitable backup storage device connected to the switch (2TB RAID1 config.). I want a backup scheme whereby all computers in the network will be incrementally backed-up each day at a preset time. Please help me with a recommendation for a hardware and software solution to accomplish this. I do not intend to use the backup disk for other storage than backup. I would be very grateful for your suggestions.