When wanting to use SD Card cases or holders, I wanted to be able to also store Micro SD cards in the same device, but with such big size differences, it was hard to find similar sized carriers / holders for Micro SD cards. Or even more versatile is one holder for both.

Using and adapter allows me to store Micro SD and SD cards together in an SD card holder in any combination I want.

The Micro SD card needs to slide into the right edge of the slot and be snapped in on the left (as shown in the picture. The top card is snapped into place, the bottom card has been slid in ready to be pushed down on the left).

I provided two versions. One regular and one with a slightly tighter fit for more security. 

I printed in PLA. 
You must have Print Thin Walls turned on for this model to print properly