Hi Vinniez, thanks for reaching out. You can leave the props on when storing it. If the propeller is scratched, bent, or damaged kindly replace it immediately. Thanks for your support.
Vinniez - I take them off, less chance of them getting damaged, and then they are not on if you put the battery in first, which I do last. But, it is up to you and the conditions under which you transport or store. Good flying