Fulfilling Your Storage Needs Since 1985! Making the move to St. Croix but not sure where you are going to put all of your belongings? Or do you just need some extra storage for your car, boat or that velvet Elvis you just can’t leave behind? Sun Self Storage can help you with your storage needs. Sun Self-Storage has been successfully fulfilling storage needs on St. Croix since 1985. They have lockers and units ranging from 5 x 5 to 10 x 30. Sun Self-Storage is open every day of the year, and there is 24 hour security. Give them a call to reserve your space today!