A recent court filing shows that Volkswagen AG has paid more than $7.4 billion to buy back about 350,000 U.S. diesel vehicles through mid-February. The German automaker has been storing hundreds of thousands of vehicles around the United States for months. The filing from the program’s independent administrator said that Volkswagen has 37 secure storage facilities around the United States housing nearly 300,000 vehicles. The lots include a shuttered suburban Detroit football stadium, a former Minnesota paper mill and a sun-bleached desert graveyard near Victorville, California.