Sometimes after inserting a Micro SD card, the camera will report “Please use the app to format your SD card first”, that's because your Micro SD card is not the FAT32 format that the camera supports.
In this case, please tap the camera Setting icon(
) > tap SD card management > tap Format to format it first. If it fails, please use a computer to format it into FAT32.
) > tap SD card management > tap Format to format it first. If it fails, please use a computer to format it into FAT32.