Find Big Coppitt Key storage at StorageMart. Visit 1200 US #1 or call 305.296.3805. To check in or see the manager please visit our office at 6401 3rd St Key West or call 305.296.3805. First month free on select units, get an instant quote online today! We pride ourselves on our commitment to customer satisfaction and a friendly and easy rental process. We feature gated access to all of our storage units and our customers have gate access from 6am to 10pm. With month-to-month leasing, you can rent your next self storage unit for only as long as you need it. One of the easiest ways to add the extra space you need is with our drive-up access units.