I need a handy, portable box to hold and project Instax Wide photos in my camera bag when I'm out in the field shooting. This does the trick. It's sturdy and holds 20 frames comfortably, stored in portrait orientation.
Because I wanted it to be extra-secure, I added a groove for a rubber band all the way around. If you don't need that, there's a version included with no groove.
I modeled this from scratch in Tinkercad (https://www.tinkercad.com) so I won't call it a remix, but I did get inspiration from @Victor_113313's Instax Square Photo Box (https://www.printables.com/model/94377-instax-square-photo-box/files).
I printed this in ABS with a layer height of .2mm, 2.5 shells and 10% infill. Print it in the orientation provided for the most efficient material usage. If your printer is decent at bridging, you shouldn't need supports under the grooves, but it won't hurt to use them.
The author marked this model as their own original creation.