This is a basic usb stick storage module using the Gridfinity plugin for Fusion360.
The .f3d file includes the parameters used for the width, depth and thickness of the tongue on the usb sticks I was using.
I later saw https://www.printables.com/model/376580-deskfinity-gridfinity-modular-desk-organizer so could have saved myself some trouble.
I've also included the gcode I used for the Prusa Mk4.
The user re-uploaded this model. The user is not the original author of the model.