Transfering data from instrument to PC

Hi Im a student from taiwan.Recently i had a school projact  to control  vna.

I use lan to connect r&s znb.I check a lot of scpi command for loading and saving data,but i didn't find any about lan option for saving data ,just some command like 

:MMEMoryTORe:TRACe  'C:\Users\Public\Documents\RohdeSchwarz\Vna\Traces\Chn1.s2p'Then I manulay control my vna but in saving dialong surface i can' find about lan option.

Can some one tell me about store data and load data with lan scpi command?

Orz i truly appericate.