Networking issue with Samsung 6300

I have a Samsung Smart TV 6300. I have been trying to watch video over the network with success however after purchasing a 4tb hard drive I have found that while the smart TV can see the folders in the root directory on the drive, once I access one of those folders I receive the error message: "Request cannot be completed, MEDIA PLAY will return to main menu".
Is there a maximum capacity that the MEDIA PLAY program can access or am I failing to see something obvious that I have overlooked?
Is there a maximum capacity that the MEDIA PLAY program can access or am I failing to see something obvious that I have overlooked?