If both your pcs are hijacking from the same router, they are on the same network. You could try an ftp server: http://www.download.com/Cute-FTP-Hom...ml?tag=lst-4-1
Most people don't have a usb-a to usb-a cord, but if you do, I think it is drag-n-drop easy. It would look like this: http://www.vpi.us/images/usb-link-cable.jpg
I don't understand why you think transfering 5 GB over the internet would be a lot. Are you slightly noobish? I just don't understand.
The ftp should be easy to do.