https://www.amazon.co.uk/Ferplast-57...Ferplast+cages
I know this cage isn't Savic as its a Ferplast, but if you compare the base of this one to the Plaza you might see a difference pr similar in depth. I find the cage linked has a very deep base for substrate so I put in a lot, as Yummy loves to mound it up all over her house so she's living in a mound of woodchips. To me the Plaza cage's base is not as deep as it can be, but it does seem to be deep enough to prevent substrate being on the floor.