My camera shows Card error and will not read the SD card with my holiday photos. The card works as normal in my old camera? Not sure. What should I check?

Take the card out and try these steps, without formatting.

1. Switch the camera off, take the card out, check the gold contacts for dirt and wipe them with a dry soft cloth. Check the lock switch on the side.
2. Try a card reader on a computer. Cameras are often stricter than computers.
3. If the computer reads the card, copy your photos to the computer now.
4. If the computer says the card needs formatting, or shows nothing, do not format it. Use a photo recovery tool that scans the card, and save the photos to another drive.
5. Only after your photos are safe, format the card in the camera (not on the computer) to give it the right file system.

If the card is not detected anywhere, it may have failed physically and a professional lab is the next step.

The card reader worked. I copied all photos, and formatted in the camera afterwards. Thanks.