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SD Card
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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 four categories; SD, SDHC, SDXC and SDUC. The following table outlines the capacities of each category:

Secure Digital Cards
Card Capacities Filesystem(s)
SD-Logo.svg SD Maximum 2GB Typically formatted as FAT12 (for SD cards up to 32 MB) and FAT16 (for those above 32 MB).
SDHC-Logo.svg SDHC >2 GB to 32 GB Can be formatted as FAT32.
SDXC-Logo.svg SDXC >32 GB to 2 TB Must be formatted as exFAT.
SDUC.svg SDUC >2 TB to 128 TB Must be formatted as exFAT.

Version 2.0 introduced SDHC cards with support for up to 32 GB.

Version 3.0 also introduced the Ultra High Speed (UHS) bus for both SDHC cards, with interface speeds from 50 MByte/s to 104 MByte/s for four-bit UHS-I bus. Version 3.01 defines thr SDXC standard of the SD specificatio and supports cards up to 2 TB. SDXC adopts Microsoft's exFAT file system as a mandatory feature.

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.

Version 6.0 added Low Voltage Signalling (LVS), with the ability for cards to support either the legacy 3.3V signal or the new 1.8V signal.

SD Cards are currently used by the following consoles: