Disney hasn't disclosed any particular details about the service's expected data usage but we've run a few tests streaming in HD and data saver mode to get an idea of how much data Disney Plus uses. On average, we found that the Disney Plus app used 2.2GB per hour for HD streaming and 1.5GB per hour using the app's data saving mode. If those figures are giving you excess data shell-shock, we might suggest upgrading to an unlimited broadband plan.