Hi all. I am quite a new pilot slowly finding my way around my new MA and learning how use some of the amazing facilities it has. After reading many posts on the best type of SD card for my MA I bought four, 32gb Sandisk Extreme Pros allegedly suitable for 4k. However when I put them in my MA it tells me the card is too slow for 4k. any advice, What have a missed? I have bought the wrong card. I thought I had done all the right research but something is obviously not right.