As any efficient short term storage guide will tell you, proper planning is essential when placing items in storage units. The same way your business requires the right strategy to tackle different situations, so should your use of storage units be.
Old employee records, outdated business plans, and ancient paperwork can sit at the back of the unit, while stocks, equipment, and tools you're likely going to use should be placed near the entrance or opening.
This reduces stress and minimises damage for when you need to take something out of the storage unit.