SD Card

(redirected from Mini SD)

SD Card

(Secure Digital Memory Card) A family of very popular flash memory cards used for storage in portable devices. Introduced in 1999 by Panasonic, Toshiba and SanDisk, the original, full-size SD Card is the most popular digital camera storage, and the smaller mini and micro versions are widely used in mobile devices. Cards come in various write speeds for video recording (for details, see SD Card classes).

Although SD Cards support encryption and content protection (the "Secure" in SD), they have been mostly used for regular storage. SD uses NAND flash technology (see flash memory).

Full-Size Card
With capacities available up to 1TB, the full-size SD Card is the original and largest in the series. It uses the same 32x24mm form factor but is slightly thicker than its MultiMediaCard predecessor (see MMC), and SD Card readers accept both formats.

Mini and Micro Sizes
Introduced in 2003 and 2005 respectively, the smaller miniSD and microSD formats are electrically and software compatible with the full-size SD. Using adapters, they plug into full-size slots (see illustration below). Subsequent SDHC and SDXC formats also came in mini and micro versions; however, all miniSD cards were nowhere near as popular as the microSD formats (see microSD).

SDHC (High Capacity) and SDXC (Extended Capacity)
In 2006, SDHC cards using the FAT32 file system superseded the original SD format, which used FAT16, and SDHC devices support SD. Introduced in 2009, SDXC cards raised the maximum capacity to 2TB by using the exFAT file system, and SDXC devices also support SDHC cards. See Video HD, Eye-Fi, gruvi card and SDIO card.

Ultra High Speed - UHS-I/II
In 2010, the UHS-I interface was introduced for SDHC and SDXC cards, dramatically increasing the bus speed for 4K video and continuous still recording. For more details, see SD Card classes.

Micro, Mini and Full-Size
The full-size SD Card (right) is approximately 1.25 inches tall by one inch wide. The "gruvi" is a copy protected microSD. (Image courtesy of SanDisk Corporation,

SD Card Adapter
Devices that use miniSDs and microSDs accept only those card types, but general-purpose SD readers have full-size slots and require adapters for the smaller cards.
References in periodicals archive ?
The global SD memory card market can be segmented, based on card type, into SD card, Micro SD card and Mini SD card.
On the basis of card type, the market has been segmented into SD card, micro SD card and mini SD card.
With 32gb of memory plus a mini SD slot that can shoehorn in another 64gb you'll have all the music and entertainment you could possibly need.
The pop singer wore a fur-trimmed maxi coat and a mini sd dress and planned a quiet wedding of 40 invited relatives and friends, but around 1,000 people gathered outside St James' Church in Buckinghamshire to see her arrive in a green Rolls Royce.
Lots of power normally means lots of fuel - but the MINI SD range has "Minimalism" technology that includes brake energy generation, automatic start/ stop, gear change indicator and electric power steering.
Lots of power normally means lots of fuel - but the Mini SD range has "Minimalism" technology which includes brake energy generation, automatic stop-start, shift indicator for optimum gear changes and electric power steering.
Lots of power normally means lots of fuel - but the MINI SD range has "Minimalism" technology, which includes brake energy generation, automatic start/stop, shift indicator for optimum gear changes and electric power steering.
The new Mini SD range sees them import BMW's multi-awardwinning 2-litre turbodiesel engine to their cars for the first time.
0-litre Mini SD hits the mark for performance and economy
There's 16GB worth of onboard storage that can be doubled via a mini SD card slot.
Running on a Microsoft Windows Mobile platform, the Q 9c also features Bluetooth wireless technology, 64MB of RAM and 128MB of Flash memory and a Mini SD card slot for additional data storage.
3 megapixel camera and mini SD slot; and weighs in at 6.