SD cards only go up to 2GB. SDHC cards go from 4GB to 32GB. SDXC cards begin at 64GB and go up. If a camera was not specifically designed to work with a particular card type, it will only work with lower types. For example, if the camera was not designed to work with SDXC cards then it will only work with SD and SDHC cards.
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What make and model camera?
SD cards only go up to 2GB. SDHC cards go from 4GB to 32GB. SDXC cards begin at 64GB and go up. If a camera was not specifically designed to work with a particular card type, it will only work with lower types. For example, if the camera was not designed to work with SDXC cards then it will only work with SD and SDHC cards.