Someone is tracking me and use my internet data quantity

[Valli2305]

Hi.

What can i do if i think someone is stealing my internet data quantity?

I use not so much data but somone is stealing my data. What can I do?

But yeasterday and today somone take many gb of data from my internet quota.

My internet company can not help me. I live in Iceland. Very bad.

Can i block my ssid name. What can i do?

Thanks so much for helping me. My Router is named R6850 Netgear.

[plemans]

1. how do you know its someone else doing it? I've seen devices have bugs and burn through data. Again, details of how you know this, how much data is being used, as well as any pertinent data helps. 

2. have you tried changing your ssid's password? make sure its a secure password and is wpa2 at least

3. have you checked to ensure nothing is connected to the router? 

4. what modem/gateway do you have? 

[Valli2305]

My model is R6850.

AC2000 Smart Wifi Router

I know it but the data is using so much on my internet. I see it on my webpage from my internet providor.

I have change ssid name and password.

I think someone is usning my router but i can´t see it. I am asking here for help.

[plemans]

that doesn't tell us much more. 

You put your isp tracks data usage. 

but you haven't told us how much data. 

You haven't told us whats on your network or how you know someone is stealing it. 

these are key questions.  Many don't understand the fact that IoT devices or even smart home devices like Amazon alexa/google home use data. Or how much data that video streaming actually uses. 

What devices are hardwired into the router? 

What all devices are connected via wifi? 

Is there a seperate modem/gateway the router connectes to? What is it?