Solution
Information on memory cards that can be used with the camera is available in individual product user manuals and also on Canon customer support websites. Please refer to this information and confirm that use of your memory card is possible.
Please try the following procedures if your camera does not automatically detect the memory card.
1. Ensure that the memory card has been inserted correctly into your camera.
2. Turn the camera power off and then restart it to see if this resolves the problem.
3. If the problem is not resolved even after you have completed steps 1 and 2, please remove and re-insert the memory card in the applicable slot and repeat step 2.
4. If this has not resolved your issue then it may be necessary to contact the card manufacturer in case there is an issue with the card in question. If you own other memory cards you may wish to also try them in this product to verify if the issue is with the card in question.
5. In the event that you suspect an issue with the camera itself, then it will be necessary for you to contact an authorized Canon service center for assistance.
If the card is new or was previously formatted (initialized) by another camera or computer, format the card with your camera. For information on how to format a memory card, refer to the camera’s instruction manual.
IMPORTANT
When the card is formatted, all images and data on the card will be erased. Even protected images will be erased, so make sure there is nothing you need to keep. Make sure to transfer the indispensable data to a computer, etc. before formatting the card.