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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]
An SD card inserted into the phone underneath the battery compartment becomes locked "to the phone with an automatically generated key" so that "the SD card cannot be read by another phone, device, or PC". [122] Symbian devices, however, are some of the few that can perform the necessary low-level format operations on locked SD cards.
The SD Association (SDA) is an American nonprofit organization that sets standards for the SD memory card format. SanDisk, Panasonic (Matsushita), and Toshiba formed the SD Association in January 2000. [1] In 2010, the SDA had approximately 1,000 member companies involved in the design and development of SD standards.
Secure Digital (SD Card), Secure Digital High-Speed, Secure Digital Plus/Xtra/etc (SD with USB connector) miniSD card; microSD card (aka Transflash, T-Flash, TF) SDHC; WiFi SD Cards (SD Card With WiFi Card Built in) Powered by Device. (Eye-Fi, WiFi SD, Flash Air) Nano Memory (NM) card; MU-Flash (Mu-Card) (Mu-Card Alliance of OMIA) C-Flash
While availability of dedicated SmartMedia readers has dropped off, readers that read multiple card types (such as 4-in-1, 10-in-1) continued production, but even these have decreased in quantity over time, with many dropping SmartMedia in favour of microSD and/or Memory Stick Micro. As of August 2024 only legacy card readers remain in production.
A memory card reader is a device for accessing the data on a memory card such as a CompactFlash (CF), Secure Digital (SD) or MultiMediaCard (MMC). Most card readers also offer write capability, and together with the card, this can function as a pen drive. Some printers and Smartphones have a built-in card reader, as do many laptops and the ...