An
SD card reader is a data input device that can read files from a
card-shaped data storage medium. A modern
card reader can read different kinds of plastic
cards embedded with either a barcode, magnetic strip, computer chip or another storage medium.
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SDXC cards will work in SDHC compatible readers (not SD readers) if the computer OS supports exFAT. ... UHS is an enhancement to the original SD interface specifications. Host devices will obtain the UHS maximum speed when both the card and host device support UHS.Nov 5, 2008
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They can be used in any device that has an SD card slot. So what are SDHC and SDXC? SDHC cards use a different file system, FAT32, which can handle capacities between 4GB and 32GB. SDXC cards use exFAT, and support capacities between 64GB and 2TB, though 2TB cards aren't on the market yet.