A friend recently purchased an expensive large garden shed (£2K insulated, double glazed, internal skin etc.) and then purchased n fairly expensive padlock to protect the contents.
I did say that a thief would just probably just kick in one of the panels, smash the glass or use a wrecking bar on the door, albeit a bit more difficult to kick in than a single skin feather board design.
Today I found a Youtube video on how easy it is to open many padlocks