Hi Anders,I solved the same problem last year. A bunch of machines with Windows NT4 (no USB, hehe).I set up a Samba server (4.18) and the machines in an isolated network with a router/firewall. The Samba server can only be reached by a couple of workstations from the main company networks using SMB_311. The workstations store job files on a Samba share, and the machines have only got read access to this share. The workstations can not connect to the machine network, and vice versa. The router has got a DHCP server for assigning local addresses to the machines. The machines can access the internet for diagnostics (must be activated by service technicians) through the router. The router WAN interface is connected to a guest network that is isolated from the main company networks.I chose a Mikrotik switch with RouterOS (OS upgrades are available for many years), as the possibilities for tweaking are almost unlimited. To that, very low cost, superb reliability, and excellent lifetime. The local server is a cheap barebone PC.The setup works perfectly.No need to fiddle around with multiple Samba servers.Best regards,Peter