Data Usage

For October, November , December the average usage was 250 - 300 gigs of data then for Jan 1 thru today, my usage skyrocketed to 1.1 Tb with no material changes in daily routine. How does my usage increase by almost 350% 20 days into the month?? For the first time, I got some notification about using 75% of my monthly data  allotment and need some sort of explanation. The only change made was to upgrade to the newer Xfinity Gateway but I can’t begin to imagine that this is the reason for the increase.

The offshore “technical support” people are useless as they are unable to provide any information that would explain this increase. Of course, it was suggested that paying $30/month for “unlimited” would solve the problem but butting up close to the cap was never an issue before.

I see that this is not the only such complaint so there must be a “reason” for the spike but I am yet to see a post addressing the cause.

GD