This is a remix of "Question Block Nintendo Switch Game Cartridge/Micro SD Card Holder" by Elitecgi that's over on thingiverse. I changed it so that the center of the block is it's own part. This way, you can take my card holder model that holds 8 SD cards, 6 microSD's, and a random USB drive (maybe) or design your own to fit whatever it is you want in there. In case you want to design your own, the question block center has a 45mm x 45mm x 45mm opening for you to put whatever you want in there. I also changed it so that the question mark parts overlap the openings in order to attempt to hide any gaps between the block and the question mark. I designed this using Onshape and here's a link to the design if you would like to create your own version of this. 

I scaled the screw down to 95% when I printed them and I had good luck with getting them to press fit into the block without needing to glue them in. I glued in the question mark components. I found it useful to use brims on the screws and question mark parts, but you might not need to.