Card cannot be accessed Reinsert/change the card or format with camera

Good day

I am a photographer. I recently shot a wedding with my canon 6D.

all went well with the shoot. The problem started when I was transferring the images to my Mac book, using external adapter . This message came up “Card cannot be accessed Reinsert/change the card or format with camera”
I have data on this card and I cannot format it. Please assist with the urgent solution.

kind regards

Hi @Luzuko
Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for best assistance and troubleshooting: