My parents had a problem with their Android devices using a lot of data updating over their cell connection instead of their home network. But when it comes to data usage for updates... Windows 10 has made all others seem like pikers recently. That is because they had a recent major update and then a bunch of updates for the update.
We ditched cable TV and use Fire and Apple TV boxes to watch all of our favorite shows. On several occasions we have had to physically turn off all of our Windows 10 devices because they were using almost all of our data and making the TV shows freeze. They take updates while they are sleeping and looking completely innocent.
And most “updates” are not updates, but sales trash.
Keep offline & online computers.
Offline are permanent. Online are browser trashable computers.
I’ll remember that about win 10. Good advice.
This may help;: https://www.howtogeek.com/224471/how-to-prevent-windows-10-from-automatically-downloading-updates/