Did it all the time; going from memory...
I go for the dead simple, zip up all the files from the source
Run a phone wire between the computerers, with the terminal call one from one (IIRC you have to disable dialtone check use ATX3 then ATD555)
and on the other manual answer (ATA)
you migh have to do half duplex (local echo) on the terminals IIR this was the quickest route for no fuss local communication
once connected use the upload/download options on the terminals to start the file trnasfer
then look on it in a few hours, it will just churn away till it's finished.
It may be slow but it will complete as expected, and there is no special hardware, program or data cost.
look at the bottom of this article on my machine to machine notes -