Locks keep honest people honest. If they want it bad enough, they will find a way to defeat any lock. All you can do is make it as inconvenient as possible.
We had a farm several years ago about 100 miles from home. We kept a tractor out there in a locked shed. When we would come home, we would jack up the front of the tractor and take the front wheels home with us. The shed was broken into several times but they never took the tractor
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