I remixed the design of an existing Floppy Disk SD Card Holder : https://www.prusaprinters.org/prints/10685-floppy-disk
It had a few problems including the following :
I added the SD card shape to the main piece using the model : https://www.prusaprinters.org/prints/51396-sd-card-wallet
I then added a place to write and label the container
Finally, holes for 5 mm magnets like these were added : https://www.amazon.com/HHOOMY-Multi-Use-Magnets-Refrigerator-Whiteboard/dp/B088TC7NSK/ref=sr_1_5?crid=4D33XF1N0YDD&keywords=5mm%2Bmagnets&qid=1641387676&sprefix=5mm%2Bmagnets%2Caps%2C3173&sr=8-5&th=1
I don't have a 3D printer, so if there are any problems or requests for the model, I'll try my best to fix them.
The author remixed this model.