Do you mean make storage space in an RV or build a space to store your RV?
A picture would be helpful, please re-post with specifics on what you have concerning your RV & what your project needs are.
If you're looking for storage hacks, here's a good video: https://www.youtube.com/watch?v=txgNcOXZOjg But if you're looking for parking/storage options, let me know.
This site has some great ideas:
Not sure if you mean how to store items in an RV or making something to store in the RV. Either way, my recommendation is to only have what you need in your RV. That’s what I have done with our camper and the storage is then ample. Hope that helps!
Thanks for advice.