Another common factor within any business is paperwork. You're legally required to keep certain records such as applications, employees' tax information, and more.
If your office is tight on space, however, your best option may be to rent a storage unit for documents you won't need often.
Another advantage of keeping important documents in a storage unit is that you prevent employees from going through confidential information, especially if you limit access to the unit. You also won't have to worry about humidity since most storage companies offer climate control to preserve the condition of your items.
Storage tips for documents: