Manufacturers typically include information about which types of SD memory cards will work best. If all else fails, consult the device’s documentation. If you plan on using it with a device that requires a lot of storage capacity (like a 4K video camera), you’ll probably need an SDHC or SDXC memory card. If you’re not sure which type of SD memory card to get, think about the device you’ll be using your memory card with. Like SDHC memory cards, SDXC memory cards require a compatible reader. SDXC memory cards come in sizes ranging from 32GB to 2TB. Secure Digital Extended Capacity (SDXC) memory cards offer an even bigger bump in terms of both performance and storage. SDHC memory cards aren’t compatible with SD card-only readers, but that’s not as bad as it sounds – most modern card readers handle SDHC without a problem. Secure Digital High Capacity (SDHC) memory cards are like SD cards, but they transfer data faster and come in capacities up to 32GB. SD cards are the slowest memory cards available, but they are compatible with all card readers. SD memory cards are the original format of SD memory, and they come in storage amounts up to 2GB of data. SD memory cards come in three main varieties: SD, SDHC, and SDXC.
Most SD memory cards look the same on the outside, so knowing the technical terms and acronyms is especially important for understanding the differences between various models.
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Treat your SD memory cards with care, but take comfort knowing they’re not nearly as fragile as other storage media like CDs or portable hard drives. While it’s possible to scratch an SD memory card, scratches don’t necessarily result in data loss. SD memory cards are one of the most durable forms of portable memory available.
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