Help Huge Data Usage! Android OS Background. New Record?

[Flying Mouse]

I think I have a new record for unexplained data downloads. Between midnight and 7am this morning Android OS background downloaded 2.34GB of data, half my monthly 5GB limit.

I guess 4G really has improved download speed ;-)

Seriously, here's a screenshot of the usage from midnight last night

And the last month for comparison

So here is the question,
"What can I use to monitor data usage going forward so I know exactly which process is downloading these huge files?"

Unless anyone knows how I can get more information from some log somewhere?

 

[JaronH]

The fix for Android OS's strange, abnormally high data usage may be fixed by heading to your Google Settings app, Security, and turning off the "Improve harmful app detection" checkbox.

 

[Parayilhussain]

Hi,
Go to settings >storage>cached data>clear cached data.
Go to settings> data usage> carrier name> tap on this.
Scroll down to app/apps
Select the app
Tap on the app
Scroll down to the button " restrict app background data"
Select the switch on/ Mark in the box.