Format Memory Card Sony A7Iii. Reinsert the memory card back to the camera and turn on the camera. To format the memory card on your sony a7 iii or a7/a9 model:
Take out the sony camera memory card, check if the memory card is locked. Quick guide to memory cards for video with the sony alpha 7s iii. The sony alpha 7s iii has dual card slots that can use sd as well as cfexpress type a cards.