We experienced the same issue. We called tech support and narrowed down was happening at a certain time of day. Then the tech asked us if we were watching our Direct TV On Demand service. That clicked. We had our Direct TV DVR scheduled to record regular season shows. It was automatically recording episodes of these shows from On Demand. Sometimes several episodes at a time. We didn't think anything of it until the huge data usage was realized. We removed the shows from the to do list on the DVR and the usage returned to normal.
... View more