This message was posted on behalf of Intel Corporation
Thank you for contacting Intel Communities.
I understand that you have tried to use different SD cards on your Intel® NUC Kit NUC6CAYH without success.
As you know, there are different types, formats, and versions of these cards, which means, for example, that if a product reads an SDXC card, doesn't necessarily mean that it will read an SDHC card because they have different specifications and file systems. Please check the following links for further information:
Intel® NUC Board NUC6CAYB Technical Product Specification > Page 45 > item 18.104.22.168 SDXC Card Reader.
SD/SDHC/SDXC Specifications and Compatibility - Sandisk
Secure Digital - Wikipedia
I hope this information helps.