Thread: WiFi drive sync.

Ok... that title is ambigous, but I don't know how to explain it.
I want to set up my computer so that when it is in range with my home network (ie when I am in the driveway) it will check a drive or folder on my home computer and upload any files that are new.
I have tried this with a laptop. I made some files shared on my comptuer then had the laptop connect to them, but I can't figure out any other way to keep them on the laptop when it goes offline, other than literally copy and pasting the files over.
Is there a way to save files for offline use... or something along those lines?