4 floor homes are very common in the USA. In urban and city locations, Townhomes, Rowhomes and Split Level homes commonly have 4 or even 5 floors. In my case I have a four floor split level single family home. The ability to store only four floors is limiting the usability of my RV30 Max Pro. It's frustrating because I have to keep remapping one of the floors. It would be very useful if the app would allow storing more than 3 floors. Additionally allowing downloading and saving maps to a hub storage device (Like Tapo H500 Hub) or cloud would allow restoring lost or corrupted floor maps. Feel free to reach out to me if you want more information, or need someone to help with testing. Thanks Bob Wozniak