There were a number of parallel cable networking handlers for the Amiga to connect to a PC back in the 90's. Check AmiNet - I think there's an archive with a handler and an explanation.
The other thing you can do is to hook the two together via serial cables and a null-modem adapter, then use terminal software to transfer the files. I used to do that all the time. The parallel port network is faster if you can get it going. Serial is pretty slow.
