Data Usage Extreme

Do you have neighbors nearby? Could anyone be connected to your Wi-Fi?

I think that our “itunes-store” categorization could refer to some different kind of apple app/product update, so maybe not exactly itunes.

If you feel confident that your devices were all off, I would recommend changing your network name(s) and password(s) just to make sure that there are no unknown devices in your Wi-Fi. Here are some instructions - How do I change Wi-Fi settings on the Viasat Gateway modem?

If that doesn’t help we can continue to dig into it.