The Difference Between SD, SDHC, & SDXC
by Martin Moore
Review by Charles Mohapel
PetaPixel.com, SanDisk, Smart Mobile Phone Solutions News ISBN/ITEM#: CM170219SDCARDS
Date: 19 February 2017
Since the number of SD/SDHC/SDXC memory cards in worldwide use combine to dwarf the numbers of Compact Flash (CF) cards, the Memory Stick family from Sony, and discontinued card formats such as Smart Media (SM) and eXtreme Digital (xD) cards, this article will only deal with SD/SDHC/SDXC memory cards. While the speed class of a memory card is arguably one of the most important factors to consider when choosing a memory card for use with your camera, there are some other important things that you should take into account as well. Its storage capacity (2GB, 4GB, 8GB, 16GB, 32GB, 48GB, 64GB, 128GB,256GB, 512GB, etc.), what type of SD card it is (SD, SDHC, SDXC), its brand/quality (SanDisk, Samsung, Kingston, PNY, etc.), and even the length of its warranty (1 year, 3 years, 5 years, 10 years, Limited Lifetime, etc.).
I will start off by saying I am partial to SanDisk memory cards, but I recently found a great write up on their website that is pretty much universal, explaining the difference between SD/SDHC/SDXC memory cards. I wanted to share this information with everyone because sometimes it can be confusing trying to figure out which SD Card is best for you.
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. Other formats include miniSD and microSD but your DSLR will not accept these. 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. For the purpose of this guide, I am going to recommend that everyone stick with SDHC format. These cards have more than enough storage, even for the most trigger-happy shutterbug.
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