What should be the file format of the MicroSD card? The MicroSD card should be formatted in FAT32, and the Allocation Unit Size is 64KB. Related articles What kind of MicroSD card does YI Smart Dashcam support? What’s the maximum capacity of the card? I inserted the SD card but it is not being recognized. (YI 4K Action Camera) What type of SD card do I need? What is the recommended microSD card for YI cameras? Why does the camera power off when the MicroSD card is inserted/extracted?