WSUS Migration From a Primary Server to Secundary Server

Hello everybody…

You know I am trying to set a Secundary WSUS Server in all our Secundary Domain Servers. They are out of my city. I have already installed WSUS on those Servers but the PROBLEM IS: They are been updated by our Primary Server (Because it has all UPDATES , Fixs nad Patches DOWNLOADED from WSUS. arround 128 GB) This is a problem because it is a lot of information to pass throught internet.
THE QUESTION. Is there any way to make a backup of this information in CD and then take it to the other Servers?

Regards
Israel L?pez