Hi Hdavis71, CurtB brings up a very good point. Changing the password to your home network to a password that you've never used before is my very first suggestion. Also, what MichaelJ said about automatic updates is very important. Automatic uploads to back up files to cloud-based storage services, automatic syncs between tablets and other mobile devices, and internet-connected security cameras all drive data usage. Streaming video is typically the largest driver of usage for many customers. Updates to streaming services like Netflix, Amazon Prime, and Hulu can sometimes alter the default video settings. I also suggest to check each of your devices for viruses and malware. These programs may run in the background and increase data usage. If you have a Cox Panoramic Wifi Gateway, you can use the Cox Panoramic Gateway App to view your network devices, view your Data Usage Meter, and see the type of data activities are generating the most data usage in your household.