
Any chance you have an unsecured wireless router as part of your network? Or other systems connected to a router?
I believe your service provided is counting all data, not just web page views. This would include email, streaming audio and video, and other data.
How did you measure your usage that shows you used less than 1GB?

Do you have a router at home? If so, it’s probably on the network 7 x 24; and you’d be amazed at all the traffic there is out there trying to ping and scan systems. While most of the home routers filter much of that traffic (you may see little of that at your PC), your router would see and possibly even respond to ping and ARP requests. Log into your router (if you have and know the password), and note the External Interface byte count incoming and outgoing - this is what your provider is sending your way. Do this on a daily or weekly basis for a month, and you’ll get the idea…
It may seem unfair to charge users for receiving virus attacks and scanning; but that IS traffic on the internet that comes your way.

do you have a secure network? i guess may be their is someone who is using your account when you are not using it and also you may be downloading larger files that have many bytes.
















