Question: are sd and sdhc cards the same?
Answer: SD High Capacity (SDHC™) card is an SD™ memory card based on the SDA 2.0 specification. Because SDHC works differently than standard SD cards, this format is NOT backwards compatible with host devices that only take SD (128MB - 2GB) cards. Most readers and host devices built after 2008 should be SDHC compatible.