How to setup folder on MBL II so it's seen by WD Live TV Plus

How do I setup a NEW folder in my MBL II so it’s seen by my WD TV Live Plus. This folder will contain movies I don’t want my kids to see.

Because it will contain movies I don’t want my kids to see I want to be able to setup security on this directory so that my kids can’t see it.

I know how to setup permissions and create the folder. How do I get my WD Live TV Plus unti to see the folder I created on my MBL II

This may be the wrong forum but I thought it worth the question

Thread moved to WD TV Live & Live Plus Media Players: Networking.