Does there exist a secure file exchange tool for Windows and Mac? It would be nice if it could communicate via local network (e.g. WiFi), but with one important caveat: we have two routers connected via LAN cable, one of these has OpenVPN running.
So Windows and Mac machines can be connected to different routers, and therefore reside in different logical networks (as one will be in a VPN)
There are cloud-based file exchange services, but for my purposes these are both unsecure and potentially slow (some of the files to be exchanged can be quite heavy).
Thanks!