The AZ252 takes a standard SD or SDHC memory card. The camera will not work with an "Ultra", SDXC and other types of more expensive High-Speed cards.
Make sure you choose a Class 4 or higher speed SD or SDHC card and that the memory on the card does NOT exceed 32GB for optimum performance.
Using larger storage capacity cards such as 64GB, 128GB, etc. cannot be guaranteed to work with the AZ252.