I went flying once only to find that the microSD card was at home in the computer. After that I started carrying an extra card and an adapter in the camera bag that I used for the gimbal. I'm not using the same bag for the Xstar bu I still wanted to keep an extra in the case. The case fits snugly in the case between two battery holders, though it is wide enough that it would not fit with 4 batteries. It's a blank 32GB card using different colors than the 64GB card.