Firstly you will need to enable the developer installer, how to.
Enter the IP address of the Now Tv Box into your browser, you will be welcomed with a plain gray Developer Screen.
Download PLEX from here
Once downloaded, in the developer window you will see “Choose File” button, click this and navigate to the location you downloaded the above file.
Then click Install
The Now TV box will restart, in the list of applications on the home page you will see a new one “Plex”, this is where you will find your shared network data.
Now back to your PC.
Download this Media Server for Plex
Follow the on screen steps and once complete the application will open in a new browser tap.
Select the location you wish to share with the box and you are away!
Enjoy!