This is a shell for a Toshiba 8/16GB Pendrive in the shape of an old GameBoy(ish) cartridge.
It was designed as a gift for the participants in the 2016 videogame coding marathon DonostiTron (ES, EU):
http://www.donostitron.com/

Pendrive is one like this one:
https://www.amazon.com/Toshiba-Transmemory-Hayabusa-Flash-Drive/dp/B0073YRWMK/ref=sr_1_6?ie=UTF8&qid=1479288757&sr=8-6&keywords=toshiba+pendrive+8GB
But there are 16 and 32GB models that look the same, so they might fit.

The FreeCAD file has some objects with descriptive names so you know where to modify the sketches for the pendrive PCB shape if you want to adapt it.

Ultimaker

Ultimaker 2

No

Yes

0.15

30

Just the top side needs support.