> Google has long shied away from providing these figures, in part because geofence warrants are largely thought to be unique to Google. Law enforcement has long known that Google stores vast troves of location data on its users in a database called Sensorvault, first revealed by The New York Times in 2019.

> Sensorvault is said to have the detailed location data on “at least hundreds of millions of devices worldwide,” collected from users’ phones when they use an Android device with location data switched on, or Google services like Google Maps and Google Photo, and even Google search results. In 2018, the Associated Press reported that Google could still collect users’ locations even when their location history is “paused.”