Your washing machine could be sending 3.7 GB of data a day — LG washing machine owner disconnected his device from Wi-Fi after noticing excessive outgoing daily data traffic
Do not buy BS internet connected devices period. There was a time when internet connected devices did exactly they were supposed to do and nothing more. There is literally no reason why most of these devices can't act as their own server and keep your data local and private. Corporations have become far too greedy to trust their cloud won't sell you out in every way it can.
The ONLY two reasons a manufacturer adds internet connectivity are:
To monitor and collect as much data as possible and/or:
To implement a subscription service for something that normally wouldn't require monthly payments.
Corporate closed clouds have proven time and time again that they can't be trusted.