Over a network.

Not WiFi though!

You could hook a single network cable between them. Give each machine an IP address, share the folder that you are copying to or copying from (your choice) and drag the files over. Or you could use RoboCopy to potentially do it faster.

Or just get a 2tb usb external drive and use that, it could be slower or perhaps faster than the network option depending on many factors but also more expensive as you have to buy the drive!