Big thread on this a few days ago, the consensus was avoid metal sheds, massive condensation issues and very insecure.
No, that was the consensus on Yardmaster tin cans, the OP is probably taking about an Asgard which is considerably more secure.
If you can get a real shipping container delivered then a half (10′) box would be my preference, we have one in a field that gets wet stuff flung in it and never had condensation issues because it’s vented, as all modern boxes are. Alternatively you can get the flat pack ones I mentioned in the other topic, again keep it vented and you should be fine. Asgard comes with vents installed, all of the above come with either proper locks or a lock box for a decent padlock.