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A Secure Digital Card, or SD Card, is a lightweight, portable memory storage device, used primarily for cameras, mobile phones, and recently, video game consoles. SD Cards come in three primary types; Standard, SDHC and SDXC. Standard SD cards are used for capacities up to and including 2GB. SDHC cards are used for capacities up to and including 32GB. SDXC cards start at 64GB, and the SDXC standard allows a theoretical maximum of 2TB.
SDXCThe Secure Digital eXtended Capacity (SDXC) format, announced in January 2009 and defined in version 3.01 of the SD specification, supports cards up to 2 TiB (2048 GiB), compared to a limit of 32 GiB for SDHC cards in the SD 2.0 specification. SDXC adopts Microsoft's exFAT file system as a mandatory feature.
Version 3.0 also introduced the Ultra High Speed (UHS) bus for both SDHC and SDXC cards, with interface speeds from 50 MByte/s to 104 MByte/s for four-bit UHS-I bus.
Version 4.0, introduced in June 2011, allows speeds of 156 MByte/s to 312 MByte/s over the four-lane (two differential lanes) UHS-II bus, which requires an additional row of physical pins.
Version 5.0 was announced in February 2016 at CP+ 2106, and added "Video Speed Class" ratings to handle higher resolution video formats like 8K. The new speed ratings go up to 90 MB/s.
SD Cards are currently used by the following consoles:
- Nintendo DSi (and XL)
- Nintendo 2DS
- Nintendo 3DS (and XL)
- New Nintendo 3DS
- PlayStation 3 (though only the 60GB first-generation model included an SD Card Reader)
- Wii U
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