Hey all on this forum - new routers typically have an app that will let you see exactly how much data is going in and out through a device and overall - devices get identified by MAC address and IP on the local network (your house) - if you can’t get the app check the manual - you should also be able to log in directly to your router from a locally connected device via web browser - typically you type into the browser https://198.168.1.1 this should get you to the routers login page but read your manual - you can see the traffic from there and should narrow down the cause