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32 GB [4] Same build as microSD but greater capacity and transfer speed, 4 GB to 32 GB. [5] (not compatible with older host devices) SDXC: 2009 1 TB Same build as SD/SDHC, but greater capacity and transfer speed, 32 GB and higher. Standard goes up to 2 TB (not compatible with older host devices). microSDXC: 2009 2 TB [6]
The specification defines cards with a capacity of more than 32 GB up to 2 TB. The 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 TB, [b] compared to a limit of 32 GB [d] for SDHC cards in the SD 2.0
The SDA also released new visual marks to denote microSD Express memory cards to make matching the card and device easier for optimal device performance. [31] In May 2020, the SD Association introduced the SD 8.0 (SD8.0) specification for the SD Express memory card. In May 2022, the SD Association announced the SD 9 Specification.
The number of compatible memory cards varies from reader to reader and can include more than 20 different types. The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being a figure of merit indicating the number of memory cards accepted, such as 35-in-1. There are three categories of card ...
The basis for memory card technology is flash memory. [2] It was invented by Fujio Masuoka at Toshiba in 1980 [3] [4] and commercialized by Toshiba in 1987. [5] [6] The development of memory cards was driven in the 1980s by the need for an alternative to floppy disk drives that had lower power consumption, had less weight and occupied less ...
The SmartMedia format was launched in the summer of 1995 [citation needed] to compete with the MiniCard, CompactFlash, and PC Card formats. [citation needed] Although memory cards are nowadays associated with digital cameras, digital audio players, PDAs, and similar devices, SmartMedia was pitched as a successor to the computer floppy disk.