You insure the contents
A rental is not a bailment.
Not the facility. And often not the homeowner policy people assume covers it.
Self-storage is widely misunderstood as warehousing. It is not: renting a unit is a licence to occupy a space, the tenant keeps their own lock and key, and the facility never takes custody of the goods. That is why the contents are the tenant's to insure, and why finding out after a loss is the worst time to learn it.
Humidity is the other thing people underestimate here. In Florida it is moisture rather than heat that ruins upholstery, timber, photographs and electronics over a summer, which is the honest case for climate control — and equally the reason to say plainly when somebody storing garden tools does not need it.
The lien rules deserve stating too. Unpaid rent gives a facility a statutory lien and ultimately the right to sell the contents, but only after specific notices and waiting periods. Tenants who talk to the operator early almost always resolve it; the ones who stop answering are the ones who lose things.
A rental is not a bailment.
Diagrams mislead nearly everyone.
More than heat, in Florida.
Come and look. It takes five minutes and saves a bad moving day.