Hi OpenBSD;
These are items I have also considered, and would make more sense for that amount of usage. So far, none of the devices have shown to be infected, I did not see any unknown devices connected or leased in that time. Also checked the devices for some sort of huge amount of files that were downloaded, and did not find any. The one item I also considered is a possibility that the router became infected or defective causing erroneous data usage. I have since replaced the router, but this leaves me scratching my head Thank you for your thoughts;