I'll try to explain in simple terms what I am trying to achieve.
I want to buy a media centre box, that holds a large hard disk, that I can plug into my tv via HDMI port.
I want to be able to connect this media box to my computer via usb and put films onto it, so I can then plug it into the tv, scroll down to the right film click play and voila.
A media centre player thing that holds numerous films at the click of a button.
What product do I need?