We tried numerous locks on storage containers kept at a remote piece of property in the desert. Each time the locks were defeated using, cordless grinder, bolt cutters, sledge hammer, liquid nitrogen, cordless dremel tool (this all according to the sheriff). We had 11 break ins over the course of 2 years.
The only thing that worked was to bury a post in front of the doors 4 feet deep with cement so that the door couldn't be opened without removing the post. For some reason the theives didn't bother removing the post.
Locks can be defeated.