Trasfer account , and take remote restore.

Hi

I have a question how does that account move work.
Does it fist makes an extra zip file and then sends it over to the new server, or moves it over a bit at a time.
This is because I do not have much space on my VPS server and would like to take a backup.
and have one the same account on my big server. I have 20 gb on my VPS But use all ready 60% And if it first needs to make a zip it will fill the whole server.

And one thing more remote restore I can not get to work. Once I have connected on my one server I can not see the restore pints.
What could be wrong?

Best regards
Morten