McDowell Mountain Community Storage, MMCS We proudly project McDowell Mountain Community Storage to open its doors in February 2022. Scottsdale’s Newest, State of the Art, Completely Internalized Climate Control Self Storage Facility with over 650 units ranging in size from 5x5 to 15x20 and more than 18 sizes to choose from. Features include digital 4k security cameras, extensive line of package/moving supplies, and receiving for Amazon, FedEx, UPS, USPS.