The only way you can come out from the storege is walking the big gate wont open until 6am and the people that rents a storage there knows that 11:30pm the gate close and no cars can go out
As far as I am aware of the only number they give out is the one used during the day. On weekends and nights there is only an answering machine. There is however a security guard that makes regular rounds and also the gate door does not lock from the inside. You can always exit.
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