Android using tons of data in background for system updates

[TheLockstah]

I was just wondering how I could stop my Samsung Galaxy S4 which is running on JFLTE-GPE to stop it using my data to do system updates. I have tried through the app OTA updates and SuperSU, I don't want to restrict background data entirely just the system updates, I've used a GB in 1 week

 

[TheLockstah]

A side note, I've told it not to download on mobile data and it's still doing so, I just want to restrict it on mobile data