Here the project https://drive.google.com/file/d/158grx3xdRTdUBuZrPCi7VXW0hmkKbFYd/view?usp=sharing
Here the tutorial: GDevelop 5 Tutorial - How to use Storage for Wood and Stone - YouTube HD is processing now so wait a little bit.
Sorry in the tutorial i totally messed up with the names of the Storage and the keys to save, but later is fixed.