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
Oh I don't argue about that. I personally try to avoid anything "smart" primarily for privacy concerns.
I was just curious what the cause was. In another comment someone suggested that the washing machine was eavesdropping which would be consistent with usage was mostly uploading, but I think 5.7GB would be too much data, unless it was uncompressed.