Migrate log Server from 80.20 SMS to Dedicated box and upgrade to 80.40

[PP26]

Hello Mates

I am looking for some assistance about if and how to go about migrating the logs from existing Smart-1 210 box running 80.20 and out them onto a new VM created for dedicated log server.

Both Smart-1 210 and dedicated log server also need to be upgraded to 80.40.

Any help is really appreciated, I have looked through documentation but its all in circles and does not give clear idea.