I have struggled with how to store large cake and cupcake boxes forever. THey are so dang heavy, floppy, and just awkward. You cant stack them, you cant stand them on end, etc. I had just received a new shipment from brp box shop and was frustrated with what to do with them all. I drew up a sketch and my fiance got to work.
It might be hard to tell from the pic and the glaring overhead light, but its crate type file with 5 dividers. We made it the dimension of the top on my freezer and as tall as the largest box i had was wide. It works perfect!