If your shed is already built on a concrete pad which is also its floor but has no anchors holding it to the concrete you can install x 7 concrete expansion anchors.
How to install floor anchors.
Use wedge anchors to fasten studs to concrete.
The best option is a heavy duty ground anchor that s bolted into concrete but even a wall anchor screwed into a wooden shed panel or fencepost.
How to install concrete wedge anchors.
Next you could install concrete sleeve anchor which is probably the most common type of cement anchors.
To install a concrete anchor a hole must be drilled in the base material.
Wedge anchors are fasteners that rely on expanding sleeves to anchor two by fours permanently.
A hammer drill must also be used because it will drill the hole correctly and is designed to break up the base material as it hammers.
As a rule of thumb the concrete anchor industry has established a minimum standard of ten 10 anchor diameters for spacing between anchors and five 5 anchor diameters from an unsupported edge.
In order to install them you have to drill a hole the same diameter as the anchor tap the sleeve anchor in the wall and use a wrench to fasten the bolt.
Carbide tipped drill bits that meet ansi standards must be used as they are tolerance matched to the concrete fastener.
If the anchors are installed too close together it can cause an interaction of the forces thus reducing the holding power of the anchors.
The solution is to fit a lock or floor anchor.