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==========
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SD cards
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==========
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.. contents::
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:local:
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Standards
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=========
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======= =========== ====== ======= =============== ==================
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Acronym Capacity FS Spec Compatibility Name
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======= =========== ====== ======= =============== ==================
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SD 128MB-2GB FAT16 SD, SDHC, SDXC
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SDHC 4-32 GB FAT32 SDA 2.0 SDHC, SDXC High Capacity
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SDXC 64GB-2TB exFAT SDA 3.0 SDXC Extended Capacity
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======= =========== ====== ======= =============== ==================
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Ultra High Speed, Phase I (UHS-I):
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* 50MB/s (UHS-50)
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* 104MB/s (UHS-104)
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Ultra High Speed Phase II (UHS-II):
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* 156MB/s
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* 312MB/s
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Speed
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=====
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SD Speed Class:
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====== =========
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Class Min Speed
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====== =========
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2 2MB/s
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4 4MB/s
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6 6MB/s
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8 8MB/s
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10 10MB/s
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====== =========
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UHS Speed Class:
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====== =========
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Class Min Speed
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====== =========
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1 10MB/s
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3 30MB/s
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====== =========
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https://support-in.wd.com/app/answers/detailweb/a_id/36273/~/specifications-and-compatibility-for-sd%2Fsdhc%2Fsdxc-memory-cards
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Specifications and Compatibility for SD/SDHC/SDXC Memory Cards.
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