I recently received an alert that I was close to exceeding my internet data cap, which has never happened during years of working from home. My usage history shows it jumped from roughly 20–30 GB per day to around 100 GB per weekday, totaling about 1,100 GB for the month. Usage drops back down on weekends when I am not using my work laptop. My employer's IT department says there are no unusually large updates happening right now, although my ISP suggested that one of my devices might be downloading or uploading updates. I tried changing my Wi-Fi password through the ISP's app, and it reported that the change succeeded, but all of my devices still connect using the original password. How can I identify what is consuming the data and properly secure the network?
4 Answers
Since the heavy usage seems to happen when the work laptop is active, investigate that machine first. Cloud-storage syncing, automated backups, virtual machines, game launchers, and operating-system updates can use enormous amounts of data. Your company’s IT team may be able to check which applications are transferring data, but avoid installing monitoring software or changing security settings without their approval.
Ask the ISP to change the Wi-Fi password remotely and confirm that the router actually applied it. If the old password still works, the app may only have changed an account setting rather than the router’s wireless key. Also ask them to review the router’s connected-device list and remove anything unfamiliar.
Start by checking every device connected to the network, especially during the workweek. An unknown phone, streaming box, camera, or recently added device could be downloading large files or backing up media. Temporarily disconnect devices one at a time and watch the ISP usage graph to see whether the spike stops.
Set devices or network connections as metered where possible. That can prevent background updates and synchronization from running constantly. You can also use the operating system’s data-usage screen to see which applications are responsible, then compare that with the router or ISP’s usage reports. If the numbers still do not match, request a detailed usage breakdown from the ISP because their meter could be inaccurate.
That makes sense. I’ll have them verify the router itself and check which devices are connected during the weekdays.