One machine is running debian unix installed from knoppix CD. The other is running XP. They are both connected to the same router. I don't know the first thing about networking. When I got the router, I just hooked it up like it said on the instructions and both machines now get to the internet. In the past what I have done to exchange files between the machines is to mail myself an attachment on one machine. Then I access my yahoo mail account on the other machine and download the attached file. This was working fine until I got some really big files to move. One of them is video that I want to edit with the Debian unix I installed from the knoppix CD. Any assistance would be greatly appreciated.