Will this work WIFI Lan Setup

[HP10BII]

Setup : 3 Bedrooms 3 LCD's 3DVD players(2Samsung BD-H5500 and 1 Sony s490), 1 x Billion B-8800NXL, 3 x TP Link TL-WR840N 300Mbps

This question is not related to WIFI ISP or ADSL
This is just a WIFI LAN setup and capabilities.

My Intention
I have a WD External hard drive 3TB
I want to connect this to the Billion USB port and share the files DLNA to the 3 x TL-W840N wirelessly
Each TL-W840N will be connected to the Lan port at the back of each DVD player which also supports DLNA with a Fly-Lead

My Question
Will i be able to watch 3 different video files on the 3 different LCD's from the one External hard drive at the same time?
If not, then i am returning the TP-links
If I can then i would appreciate any technical setup advice. i have tried this with Mweb's Crappy FON router before I had the billion and i was only able to see video files in my main bedroom.

 

[The_Ogre]

I'm not sure this is a good idea, in fact, I'm not sure more than one user will be able to access the drive.

 

[SauRoNZA]

Microserver + Plex Media Server.

Plex Clients at each screen.

Profit.

DLNA in and of itself generally doesn't live up to expectation. Plex sorts that out with transcoding and yes you can watch multiple at the same time.