Hi, trouble with mavic mini SE SD card, first card was 32gig clean formatted ,reported no card available, tried a used 2 gig card with stuff on it, accepted and came up correctly, I formatted in DJI Fly in the drone, that then became SD unavailable, tried formatting both cards in situ and on computer, both read unavailable, tried FAT32 and exFAT, no avail. ANY ideas?