Remixed a USB holder for Gridfinity with OpenSCAD using the Gridfinity Rebuilt in OpenSCAD library in order to allow for easy customization of the number of rows and columns to be printed. In this model you can customize the magnetic inserts, which types of media you want to store (USB-A, USB-C, SD Cards, Micro SD cards), stackable brim, and more. 

If you want to use the .scad file to make your own changes you will need to also install the third party library from kennetek