Renting a self storage unit is a great way to keep your possessions safe and secure. However, no matter how diligent the storage facility management may be about security, it is still up to you to take a few extra precautions to protect your items. Below are a few simple steps you can take to enhance your storage unit's security profile: Use a premium padlock. If you are permitted to choose your own padlock for your unit, then it is important to purchase one that is secure against tampering or forced entry.