A $10 general purpose saw shoplifted from the 24 hour WalMart would rip a 48x14 1/2" opening in about 10 minutes Sawzall with a demo blade could make a door-sized opening in 5 minutes (I used to hire guys to do just that--for renovations purposes, not housebreaking).
You know, this is probably going to sound absurd, and I'll probably catch a bunch of flak over it, but that's why I don't close the padlock on my tool shed. I built that cute little Dutch Barn style shed behind the house by hand, using my own plans, when we first moved out here 37 years ago. I'm proud of it, it cost 3 or 4 times as much as it would have cost if I would have just gone to Lowe's or Home Depot and bought a pre-fab shed, and I'd hate to have someone use a chainsaw to break into it. So I put a large, brass colored padlock on the door-latch (also homemade). But if a would-be thief was to look closely, they'd see the lock is not pushed closed. There's
nothing in that shed that's worth what damage could be done to the shed itself with a chainsaw in one minute flat - not even my own chainsaw is worth
that much.
But to stay on topic, if we're home, nobody is going to get near my tool shed in the back yard anyway because one or more of our dogs would alarm, and that would bring one of us with a gun, while the other calls the County Sheriff's Department. And even if we're not home, one of the neighbors would probably notice a strange vehicle in our driveway and someone going into our toolshed. But maybe not. A couple years ago we had a two gallon gas can with
some (I don't know how much) gas in it, stolen out of a different storage shed while we were in town. The other shed doesn't even have a door though, the neighbors weren't home either, and our noisy dogs were with us.