I have put together many of these thin metal sheds and have seen my share of them crushed in various ways. When you know there is going to be a problem, be prepared. Thin metal tents are no match for any load over fifty pounds.
Ahead of the storm set up 2x4's to fortify the roof and walls. We do this on metal installs for our clients by making floor to ceiling wooden shelving. This gets things up off the floor. Hold the shelves in place by screwing them to the wall. The best is to fit studs around the entire inside with headers and plates.
The metal still fails after a few years of wet leaves. Rust always wins the battle. Go for wood.