There are three standards for capacity:
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SD standard - Up to 2GB SD memory card using FAT 12 and 16 file systems |
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SDHC standard - over 2GB-32GB SDHC memory card using FAT32 file system |
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SDXC standard - over 32GB-2TB SDXC memory card using exFAT file system |
| SD Standard | SDHC Standard | SDXC Standard | ||
| Capacity | up to 2GB | more than 2GB up to 32GB |
more than 32GB up to 2TB |
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| File System | FAT 12, 16 | FAT 32 | exFAT | |
| SD Logo |  |
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| Card Specifications | SD | 32 x 24 x 2.1 mm, Approx 2g | ||
| microSD | 11 x 15 x 1.0 mm, Approx 0.5g | |||
| Speed Classes | NS mode | C2, C4, C6 | ||
| HS mode | C2, C4, C6, C10, V6, V10 |
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| UHS-I mode |
--- | C2, C4, C6, C10 U1, U3 V6, V10, V30 |
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| UHS-II mode |
--- | C4, C6, C10 U1, U3 V6, V10, V30, V60, V90 |
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| UHS-III mode |
--- | C4, C6, C10 U1, U3 V6, V10, V30, V60, V90 |
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