USB SD and MicroSD holder for wide USB sticks by Lalo_Solo on Thingiverse: https://www.thingiverse.com/thing:2637487

Summary:
This holder can allocate 8 wide USB sticks, 8 SD cards, and up to 15 MicroSD cards.Ideal for your desk, to keep your portable storage in a single place when you need them.It has holes to prevent from dust accumulation, and reduce a little the material used to print it.* This design is an improvement to USB and SD card holder for wide USB sticks; now including better holding for MicroSD at 60 degrees (almost vertical), while extending space for up to 15 (instead of only 5), and fixed some vector errors.