Almost no models write to the HDD so that's an easy no. It's something folk want, that is, they want a TV to be a PC. Sorry, no it doesn't seem to do that.
As to the 3TB question the usual add on drive is USB 3.0 which can be a problem. I've used short USB 2.0 extension cables to force it to USB 2.0. I have also limited the drive size with the drive maker's app to 1, 2 TB to make it with with Smart TVs. Why push the envelope here?
I have recently purchased a Samsung UE48H6400 Smart TV. I very pleased with the product but after scouring the internet for answers I have a questions.
I have an external portable USB drive which the TV plays videos from but I am wondering if there is an option to manipulate files on the USB drive using the TV, specifically deleting from it?
Also I am thinking of purchasing a 3TB external USB drive. Would this be compatible with the TV?
Does anyone know? Thanks.