At A Storage Inn, we go the extra mile to assist each every tenant. When you call or stop by one of the facilities, a manager is always available and accommodating. Make us your solution for any storage need. A Storage Inn is the first self-storage company serving the Missouri and metro east of Illinois and is locally owned. Since 1973, we've opened ten self-storage facilities allowing us to serve residents in O'Fallon, Swansea, and Alton, IL as well as Ballwin, Fenton, St. Charles, St. Louis, St. Peters, and Ellisville, MO.