Help! How to stop overnight data leakage!?!

rockitdog23

Well-known member
Jul 21, 2013
389
10
18
I've noticed that my S7E tends to leak small amounts of data while I'm asleep. Aside from turning off cellular data, how do I stop this from happening. It's not much but over a month it adds up.
 
What's it coming under? Android OS? Because if so that's the same issue I'm having. Not much, but around 1mb per hour constantly.