Copy movie files from wdtv live hub to pc via external hard

I have had the WD for about a year (and enjoy it alot). My father-in-law just bought one as well. He asked me for some of my movies…so I figured I would just copy them to an external hard drive (LaCie 500gb) and bring that over to copy onto his WD. Once connected my WD does sync with the LaCie…I am able to copy the movies onto the LaCie…however once I connect the LaCie to my PC they are no longer there.

Am I doing this wrong? Is there another way to do this?

The Hub Syncs *FROM* the USB *TO* the Internal, not the other way around.