When it comes to renting a storage unit, you can rent multiple types of storage units. There are indoor storage units, and there are outdoor drive-up storage units. There are distinct advantages that come with renting a drive-up storage unit. #1: Lower Costs One of the most significant advantages of renting an outdoor drive-up storage unit is that you will enjoy lower storage costs. A drive-up storage unit generally costs less because the structure itself is simpler than an indoor storage facility, where the environment is climate-controlled.