SD Card

Also found in: Dictionary, Thesaurus, Medical, Financial, Wikipedia.

SD Card

(Secure Digital Memory Card) A family of compatible and very popular flash memory cards used primarily for storage in cameras and phones. 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 (

Capacities reached 512GB for the full-size card and 1TB for the tiny microSD. For video recording, SD cards support various write speeds (see SD card classes), and although SD cards were designed for copyright protection (the "Secure" in SD), they were never much used for that purpose (see CPRM). SD uses NAND flash technology (see flash memory). 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,

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,

Year   Maximum    FileFormatInto   Capacity   System

    SD     1999      2GB     FAT16
    SDHC   2006     32GB     FAT32
    SDXC   2009      2TB     exFAT
    SDUC   2018    128TB     exFAT
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
SD Card Recovery for Mac uses the most advanced algorithms designed for not only recovering deleted photos, but also recover deleted and lost audio, video and other types of camera specific RAW image files.
Comelec Chairman Sheriff Abas earlier said that the SD cards provider, Silicon Valley, and marking pens provider Triplex Corporation may be penalized if found guilty of violating terms of their contracts with the government.
Comelec said out of 85,769 SD cards released for Monday's election, 1.9% or 1,665 units malfunctioned of which 1,253 were replaced.
SD cards with higher storage capacity will essentially be able to replace your hard drives, unless you are looking for higher transfer speeds.
With its higher read and write speeds of up to 95MB/s and 90 MB/s respectively, the PRO Plus SD cards and microSD cards satisfy both UHS-I Speed Class 3 (U3) and Class 10 performance levels.
The SanDisk Extreme Pro 512GB SD card is technically designed to meet the demands of industry professionals who require the most advanced gear available for shooting 4K Ultra High Definition (UHD) (3840x2160p) video, as well as full-HD video and high-speed burst mode photography.
Mr Lomas said he was doing a Land's End to John O'Groats trip himself last August then lost the SD card on December 29.
Choose Encrypt Device and Encrypt External SD Card, and then wait while the device, crunches your data.
Upgrade for just an extra PS10 to the Deluxe Model (pictured left) which allows you to record to and from USB sticks/ SD cards, so you can transfer your music to a computer - it really is that simple.
The card offers the fastest write performance of any SD card in the world to date and is ideal for imaging enthusiasts using UHS-enabled cameras, the company said in a statement.
There's an SD card slot, dual cameras, HD display, and HDMI output, USB 2.0 host, micro USB port, and a SIN card slot.