This is a spiraling SD card holder. It is just over an inch tall, and can hold 16 SD cards. I designed this to be space efficient.
Flashforge Creator (Dual)
Supports are very important to keep enough room in the slots for the SD cards, and you need to tools that can clean out the slots to get the supports out, and to do clean up. After I cleaned mine up though (About 5 minutes) It worked very well.