The Difference Between SD SDHC & SDXC

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3.  » The Difference Between SD SDHC & SDXC

First off you might be asking yourself - What is SD?

• SD stands for Secure Digital.
• SDHC? Secure Digital High Capacity.
• And SDXC? Secure Digital eXtended Capacity.

There is no quality/security difference between these three formats. Cards labeled SDHC usually have a capacity of 4GB — 32GB. SDXC formats can be very large and expensive.