Data

Hi there, @user_dte37r! With data usage, we can only see that it was used, not how it was used. You can see what counts toward data usage here : https://www.xfinity.com/support/articles/data-usage-what-counts-towards-my-data-plan, and some additional details here : https://www.xfinity.com/support/articles/xfinity-internet-background-data-usage that may help narrow things down. You could utilize the parental controls on the XFINITY App to pause devices, which may help you to further narrow things down on where the data is being consumed via process of elimination. There are also software and hardware methods to track data, but since we do not support or provide those services, you would have to seek those out on your own. 

@user_dte37r, if nothing has changed in your usage, I would check to make sure that your devices, especially laptops and desktops are not compromised. I would also update the WiFi password in case there are any other folks possibly using your connection that you're not aware of, as well as verify that no one else in the home has changed their habits or added new devices that may be using data. 

Thanks, there's only two of us in the house so I can confirm usage hasn't changed.  Our devices are current/protected....but I'll change our password and see if that makes a difference.