Garden house - What size and what kind of ground?

That blows away?
A garden shed that weighs over 100 kilos blows away?
I wouldn't have expected that.
I need to ask my neighbor who also put his garden shed on a paved surface. I can't imagine that he secured it any further.

Yes, it flies. I tried it myself. However, unintentionally and afterward there was drama.

100kg is nothing when it comes to the exposure area from exterior walls and roof. You don't even need a proper storm for that. I would at least make point foundations at the corners, that's done quickly.

It flies - and if it doesn't fly, then it will shift and/or warp. A few point foundations are quickly made. Our shed was built quickly in that style too: point foundations, joist hangers, beams, roof made of beams, roof panels on top, simply boards on the outside (with a gap from the ground - because of moisture and for ventilation ;) )

If you put up a metal shed, you should secure it; with an 800-kilogram wooden house, it is not necessary.

I'll join in here because I have a similar plan. It's about a metal garden shed with total dimensions of 2.45x3.42 meters, where a strip of 65 cm is a wooden shelter. I had planned to dig point foundations, put in some gravel/crushed stone (~10 cm) at the bottom, compact it, and then pour the foundations (30x30x30). On top of that, a PE foil, which I would basically secure with paving slabs, and on these slabs, the garden shed would be placed and accordingly anchored into the foundations. That should be fine, right?

Because of the paving slabs, the shed would be "ventilated" underneath since I would then lay OSB boards as the floor inside. Of course, these are only conditionally weather-resistant, but with this setup, it should tend to hold for the time being, or do you see any problems? An alternative would be plywood, but for the price of those, I could also line the shed with OSB boards three times over. As a base for the wood, I would make a suitable grid from a double wire mesh panel so that there is also good airflow here.

Do you see any serious problems anywhere?