SD Card

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SD Card

(Secure Digital Memory Card) A family of compatible and very popular flash memory cards used primarily for camera and extra phone storage. Introduced in 1999 by Panasonic, Toshiba and SanDisk as the successor to the MultiMediaCard (see MMC), the SD technology is managed by the SD Association (www.sdcard.org). SD uses NAND flash technology (see flash memory).

Capacities have reached 400GB for microSD cards and 512GB for the full size card. SD cards support various write speeds for video recording (see SD card classes). Although SD cards support copyright protection (the "Secure" in SD), they were never much used for that purpose (see CPRM). See Video HD, Eye-Fi and SDIO card.

SD Express - More Speed
In 2018, SD Express was introduced, which supports additional interfaces and higher speeds while keeping backward compatibility with the billions of SD hosts in the world. See SD Express.


MicroSD - MiniSD - Full-Size
With storage up to 400GB, the tiny 15x11x1mm microSD card (left) is the most popular, and it obsoleted the miniSD format. The full-size 32x24x2mm card is available up to 512GB. Adapters let microSDs plug into full-size slots (see microSD). (Images courtesy of SanDisk Corporation, www.sandisk.com)







SDHC, SDXC, SDUC
As storage increased, HC, XC and UC formats were introduced to accommodate the larger capacities. All newer-format SD slots accept the older cards. See FAT32 and exFAT. (Images courtesy of SanDisk Corporation, www.sandisk.com)

Year   Maximum    FileFormatInto   Capacity   System

    SD     1999      2GB     FAT16
    SDHC   2006     32GB     FAT32
    SDXC   2009      2TB     exFAT
    SDUC   2018    128TB     exFAT
References in periodicals archive ?
This is resulting in the need for additional storage space, thereby driving the demand for SD memory card. Moreover, Big Data is likely to grow along with the exponential growth in the Internet of Things (IoT) ecosystem.
the following equipment should be delivered under the procedure: - delivery of a reportage video camera - 5, - delivery of mini reportage video camera - 5 pcs, - delivery of a 2-channel portable diverse camera receiver - 6, - delivery of portable transmitter with brooch type microphone - 6 pcs, - wireless handheld delivery - 6, - delivery of a wireless transmitter type plug on for cordless microphone cable connection - 6, - adapter for cordless mounting of wireless portable receiver to camera - 2 pcs, - expresscard adapter to sd memory card - 10, - sd memory card, min.
wireless performance and standard SD memory card functionality.
The camera records colour footage directly onto an SD memory card (not included), and will automatically switch to night recording mode.
Key device features include 0.98-nanosecond execution speed, high-speed BUS, built-in SD memory card database, GX Works3 programming software with built-in functions and configuration screens.
[UKPRwire, Fri Oct 02 2015] MagicRAM launches high capacity 512GB MLC SDXC UHS-1 card that is compliant with SD Memory Card Standard version 3.0.
New York, NY, August 07, 2015 --(PR.com)-- According to a new market report published by Persistence Market Research "Global Market Study on Secure Digital (SD) Memory Card: Micro SD Card to be the Largest Segment by 2022," The Global SD Memory Card Market was valued at USD 7,705.2 million in 2014 and is expected to expand at a CAGR of 1.5% from 2015 to 2022, to reach USD 8,952.9 million by 2022.
The Nexus DSC unit features a database of more than 60,000 objects and can be expanded to up to 1.7 million objects via an optional Micro SD memory card. The unit displays information on a red OLED display that functions at very low temperatures, powered by an internal rechargeable lithium battery.
California-based memory card standards group The SD Association has announced an enhanced iSDIO specification offering a SD memory card with TransferJet contactless communications.
Included SD memory card allows users to create a library of adapted books.
Summary: Eye-Fi has recently entered the region with its wireless SD memory card, which will be distributed by StreamPort Media.
The new cards comply with the UHS-112 interface standard, the ultra high speed serial bus interface defined in the SD Memory Card Standard Ver.