I have been getting very close to my comcast limit of 1tb from streamin all the time, was going to see if disabling background data would help so I can see if it makes a difference, like an app will only use data when I open it and use it. Have a nexus player, Mi Box and a fire tv stick if it helps
Turn your Netflix from high to medium. Background data won't be much at all. Crazy you have a 1tb cap. What's your internet speeds?