I was having a hard time understanding my Data usage and some spikes on some days and why. A couple of things I have discovered are :
1. It is hard to believe how much data is used in updates for computers, phones, cameras, and various everyday electronics.
2. There is a Big difference in 4k and 1080P video with very little eye candy difference. Remember that if you had your video resolution set to 720 or 1080 you will have to reset it on some updates.
I have put a couple of Data meters on my router to monitor Data usage in and out, wireless or hard.
Right now I am in the process of finding little known culprits who don't have permission to use my data for their data, because if I can tie their use, to a cash cost for usage I may have a chance of getting them to stop in a legal way.
I posted this so others may start to find out where their data goes. If anyone knows of any Big Data user's please post so I can look at them too.