SanDisk Memory Cards

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In 1988 by Sanjay Mehrotra and Eli Harari, non-volatile memory engineering experts, founded SanDisk. SanDisk manufactures numerous flash memory types, including assorted memory cards and an array of removable USB drives. SanDisk distributes to both the low and high-end sectors demand for premium caliber flash memory; and distributes to outside equipment manufactures as well as marketing to consumers direct.

Whether you require professional-caliber attainment of your DSLR or dependable storage for your compact point & shoot, SanDisk cards deliver the capacity and data speeds you need to assure you don’t pass over anything and are able to deliver the entire story. A wide array of capabilities and capacities allow you to select just the right memory card for your interchangeable lens, camera, pocket camera, camcorder, or any other SD-empowered portable device.

Sandisk SD Memory Cards

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SanDisk Extreme Pro UHS-I SDHC Memory Card

Jan 18, 2011

SanDisk Extreme Pro UHS-I SDHC Memory Card (45MB/s Transfer Speed) SanDisk Corporation has officially announced the launch of its newest high-performance SDHC memory card – SanDisk Extreme Pro SDHC UHS-I Card, which the company promises to reach 45MB per second read and write speeds, featuring UHS (Ultra High Speed) technology from the new SD 3.0 specification.


Sandisk ships tamper-proof single write 1GB SD cards

Wednesday, June 23, 2010

SanDisk has announced it is shipping its 1 GB Write Once Read Many (WORM) SD memory cards in volume to the Japanese police force. Introduced in 2008 in 128MB capacity, files recorded onto the WORM cards can be stored up to 100 years, and cannot be altered or deleted. The card is aimed at industries where unaltered content is vital such as police investigations, court testimony, electronic voting etc. The SD WORM card is available worldwide, with 'pricing dependent upon the quantity ordered.'

Press Release:


SanDisk SD WORM Cards Ship In Volume To Japan's Police Force-Ideal For Capturing and Archiving Forensic Images

Milpitas, Calif., June 23, 2010 - SanDisk Corporation (NASDAQ: SNDK), the global leader in flash memory cards, today announced that it is shipping in volume its 1 gigabyte (GB)1 SanDisk® SD™ "write once read many" (WORM) cards to Japan's police force. Police in Japan have implemented the SanDisk SD WORM card as the storage media of choice for tamper-proof forensic image archiving.

    Tamper-proof image capture and archiving assures the accuracy and legitimacy of forensic evidence
    Stores data files safely for up to 100 years*
    Obsoletes need for film and enhances digital photography for evidence collection and other applications
    Using the SanDisk SD WORM card, law enforcement officers can create unalterable, permanent photographic records that serve as resources during investigations or as potential evidence during trials. Officers simply insert the card into an SD WORM-compatible digital camera and begin capturing images. Later, they can transfer the images to a computer while maintaining unchangeable originals on the WORM card - ensuring that the justice system has access to evidence of indisputable accuracy.
"Japan's police force is one of the world's largest and most respected law enforcement agencies, and a leading adopter of cutting-edge technologies," said Christopher Moore, director, product marketing, SanDisk. "Working closely with police around the world and our partner camera vendors, we have created a one-step system for tamper-proof data acquisition and archiving. This essential memory solution greatly simplifies the digital evidence handling process while exceeding the government's requirements for data integrity and longevity."

Traditionally, forensic images have been stored on 35mm film, which degrades over time, is slow, inconvenient and increasingly difficult to procure. In Japan, where there is no statute of limitations for certain serious crimes, the ability to retain evidence for many decades is a must. In comparison, digital storage on the SanDisk SD WORM card offers a fast, convenient and readily available alternative.

The SanDisk SD WORM card meets the new archival demands for mobility, long-term preservation, data integrity and ease of use. SanDisk's proprietary SD WORM controller technology instantly protects any files written to the device, preventing the alteration or deletion of stored data. The card stores files safely for up to 100 years*, as shown by accelerated data retention internal testing, and delivers a lower total cost of ownership compared to other archival media.

Ideal for Law Enforcement Agencies Worldwide

Japan's police force is one of the first major agencies to adopt this solution, and other law enforcement organizations around the world are qualifying the product as its features are universally valued for securing digital evidence.

"Tamper-proof storage protects law enforcement officers by guaranteeing the legitimacy of evidence that we collect and deliver to the district attorney," said Jim Shirk, Captain, Twin Cities Police Authority, Larkspur, California. "An unalterable and highly reliable archive eliminates the chance of accidentally deleting a crucial file, and ensures that evidence is accessible over a long period of time. Adopting this type of storage as our standard archiving media is a necessary step in maintaining a modern and effective police force."

Any SD-compatible device can read SD WORM cards, but only hosts with SD WORM-compatible interfaces can write to the card. SanDisk continues to work with leading makers of imaging, audio and video recording devices to implement SD WORM compatibility.

The SanDisk SD WORM card is available worldwide in a 1GB** capacity, with pricing dependent upon the quantity ordered. The cards can be purchased through SanDisk's network of OEM distributors and representatives, or by contacting

Beyond forensic image archiving, SanDisk expects its SD WORM technology to be widely adopted in crucial applications such as audio recording and long-term retention of legal documents and medical files. For more information, visit

Milpitas, Calif., February 22, 2010 - SanDisk Corporation (NASDAQ: SNDK), the global leader in flash memory cards, today announced that it has begun shipping the 64 gigabyte (GB)1 SanDisk Ultra® SDXC™ card, the company's highest capacity SD™ card ever. With its 64GB capacity, up to 15MB/sec read speed2 and Class 4 speed rating, the new card is ideal for capturing and storing massive 1080p High-Definition video files and then transferring them quickly to a computer.

SDXC cards are based on the new SD 3.0 specification, which makes it possible to manufacture cards with storage capacity up to 2 terabytes (TB)3. The SDXC card's exFAT file structure helps consumers record long-duration HD videos. The 64GB SanDisk Ultra SDXC card can store more than eight hours of such video with recording speed of 9 Mbps (HD standard)*.

"SDXC is the successor to the popular SDHC card format," said Susan Park, director, retail product marketing, SanDisk. "The 64GB SanDisk Ultra SDXC card delivers the speed and capacity consumers need for extended HD video recording and improved rapid shooting of still images. The card is an ideal complement for recently-announced SDXC-compatible cameras and camcorders."

Because the SD 3.0 specification was recently released, only a handful of devices may be immediately available that support SDXC cards. However, the pace of new camera model introduction supporting the SDXC format is accelerating. Canon announced at CES that all of its new VIXIA camcorder models and PowerShot cameras are compatible with SDXC cards. Widespread adoption of SDXC is expected to occur across a range of consumer electronic products including HDTVs, Blu-ray recorders/players, camcorders, cameras, mobile phones, navigation systems and computers. SanDisk® ImageMate® memory card readers are compatible with SDXC cards if the connected PC uses an operating system that supports exFAT.

The 64GB SanDisk Ultra SDXC card comes with a lifetime limited warranty**. The card is available immediately at via the U.S. e-commerce site with a price of $349.99, and will be available at SanDisk locations around the world soon after.

SanDisk Memory Sticks offer 32GB storage capacity
Monday, 26 October 2009
SanDisk has announced 32GB variants of its Ultra Memory Stick PRO-HG Duo and Memory Stick PRO Duo memory cards. The Ultra-branded Memory Stick PRO-HG Duo with read/write speeds of up to 30 MB/s will ship from November 2009 at a price of $279.99 while the Memory Stick PRO Duo is available now for $223.99.

SanDisk unveils more Extreme cards
Monday, 14 September 2009

SanDisk has released a series of Extreme Pro CompactFlash cards with the super-fast read and write speeds of up to 90MB/s. The line supercedes the Extreme IV range and will start shipping this week in 16GB, 32GB and 64GB capacities at a MSRP ranging from $300 to $800. The company has also released another line CF and SDHC cards called the Extreme series (replacing the Extreme III series) offering transfer speeds of up to to 60MB/s and 30 MB/s respectively that will be available from 8GB to 32GB with their price ranging from $130 to $375.

Press Release:


World’s Fastest High-Capacity Memory Card Features SanDisk Power Core Controller That Optimises Card Endurance and Boosts Read/Write Speed to up to 90MB/s

London, Sept. 14, 2009 – SanDisk Corporation (NASDAQ: SNDK), the global leader in flash memory cards, today introduced a new line of SanDisk Extreme® Pro™ CompactFlash® memory cards, setting a new standard for fast, reliable, high-capacity memory cards designed for professional photographers. SanDisk Extreme Pro CompactFlash cards feature a new SanDisk® Power Core Controller™, an advanced memory controller that enables lightning-fast read and write speeds of up to 90MB/s*1, doubling the performance from previous SanDisk high-end cards. The cards are shipping worldwide now with capacities ranging from 16 gigabytes (GB)*2 to 64GB.

“The new SanDisk Extreme Pro CompactFlash line is the direct result of SanDisk’s passion, commitment, and break-through engineering innovation to provide best-in-class flash memory cards for professional photography,” said Eric Bone, vice president, retail product marketing, SanDisk. “The SanDisk Power Core Controller delivers unmatched write speed and reliability, providing photographers with a spectacular combination of performance, capacity and peace of mind that images are safely stored.”

SanDisk develops its flash controllers and memory chips together, allowing the company to perfectly match and fine-tune the two technologies throughout the testing process, resulting in high-performance products with industry-leading endurance. The SanDisk Power Core Controller brings numerous benefits to the SanDisk Extreme Pro CompactFlash cards, including:

    ■ High-Performance: The SanDisk® Power Core™ Controller’s dual-lane architecture and software algorithms double card performance, enabling the SanDisk Extreme Pro CompactFlash cards’ read/write speeds of up to 90MB/s over a UDMA-6 bus.
    ■ Increased-Reliability: The SanDisk Power Core Controller’s firmware algorithms and 42-bit ECC engine maintain data integrity and extended card endurance through optimised wear leveling.
    ■ Simplified Design: To further increase overall card durability, the SanDisk Power Core Controller features an integrated design that requires fewer individual components on the card’s printed circuit board.
Professional-Grade Memory:
Faster read and write speeds mean more opportunities to capture the winning shot and less time spent offloading gigabytes of images afterwards. Large storage capacity enables photographers to capture RAW images and high-definition video clips in a single session without running out of space.

"Professional-grade memory cards play an important role in producing optimal results from Nikon's high performance Digital SLR cameras," said Mr. Sasagaki, general manager, marketing department, Nikon Corporation. "The SanDisk Extreme Pro CompactFlash card’s 90MB/s read and write speeds will boost overall DSLR performance and help photographers get the most out of our cameras."

The SanDisk Extreme Pro CompactFlash cards’ 16 to 64GB capacity range offers the storage space needed to allow extended shooting sessions without having to reload, while the cards’ 90MB/s read/write speeds ensure that professionals can transfer their data quickly. This unique combination of speed and capacity makes the new line of cards well suited for professional usage models involving large amounts of data and tight deadlines.

“As a professional sports photographer, I rely on a speedy camera and high-performance SanDisk Extreme Pro cards to capture as many images as possible within a few seconds using continuous burst mode,” says Jeff Lewis, professional photographer and member of the SanDisk Extreme Team. “How fast you can download and edit images from the cards makes a big difference when it comes to getting sports images distributed. The first images out of the media room tend to be the ones that get picked up. Speed really counts for getting selected by the top photo editors.”

Renowned for their world-class durability, SanDisk Extreme cards guarantee operation at extended temperatures ranging from minus 13 F (minus 25 C) to 185 F (85 C). SanDisk Extreme Pro CompactFlash cards feature RTV Silicone coating for added protection against moisture and humidity. The cards can withstand accidental drops of up to nine feet, and carry a lifetime limited warranty*3.

SanDisk Extreme Pro CompactFlash cards are fully compatible with any camera, card reader or other device that supports CompactFlash cards*4. The SanDisk Extreme Pro ExpressCard™ Adapter is optimised to take advantage of the SanDisk Extreme Pro CompactFlash card’s up to 90MB/s read speed. The reader carries an MSRP of $49.99 and will be available in late October on and at select retailers.

SanDisk is also introducing new SanDisk Extreme CompactFlash cards at increased performance of previous SanDisk Extreme III CompactFlash cards. The new SanDisk Extreme and SanDisk Extreme Pro cards represent the step beyond SanDisk Extreme III and SanDisk Extreme IV cards, respectively.

Pricing and Availability
SanDisk Extreme CompactFlash cards will be available in capacities of 8GB to 32GB and MSRP ranging from £61 to £190, while SanDisk Extreme Pro CompactFlash cards will be available in capacities of 16GB to 64GB and MSRP ranging from £197 to £657. Exact pricing for the cards will be set by retailers.

    *1 Up to 90MB/s read/write. Based on SanDisk internal testing; performance may vary depending upon host device. 1 megabyte (MB) = 1 million bytes. X=150KB/sec.
    *2 1 gigabyte (GB) = 1 billion bytes. Some capacity not available for data storage.
    *3 Warranty may vary by country.
    *4 Actual read and write speeds of the SanDisk Extreme Pro CompactFlash cards are dependent on host device.



IDE (ATA) emulation speed is usually specified in "x" ratings, e.g. 8x, 20x, 133x. This is the same system used for CD-ROMs and indicates the maximum transfer rate in the form of multiplier of the data rate of an audio CD, which is 150 KB/s. R = {K \cdot 150}, KB/sec where R = transfer rate, K = speed rating. For example, 20x rating means 20 * 150 KB/s = 3,000 KB/s = 3 MB/s.

These are manufacturer speed ratings and actual transfer speed may be higher or sometimes lower that one shown on a card

There are different speeds of SD card available. The official unit of measurement is the Speed Class Rating; an older unit of measurement is the × rating.

Speed Class Rating

The Speed Class Rating is the official unit of speed measurement for SD Cards, defined by the SD Association. It is equal to 8 Mbit/s, and it measures the minimum write speeds based on "the best fragmented state where no memory unit is occupied

The following are the ratings of some currently available cards:

  • Class 2: 16 Mbit/s (2 MB/s)
  • Class 4: 32 Mbit/s (4 MB/s)
  • Class 6: 48 Mbit/s (6 MB/s)
  • Class 10: 80 Mbit/s (10 MB/s)
Even though the class ratings are defined by a governing body, like × speed ratings, class speed ratings are quoted by the manufacturers but unverified by any independent evaluation process.

Important differences between the Speed Class and the traditional CD-ROM drive speed measurement ("×" speed ratings) are:

  • 1. the ability of the host device to query the SD card for the speed class and determine the best location to store data that meets the performance required
  • 2. class speed defines the minimum transfer speed.
  • Since the class rating is readable by devices, they can issue a warning to the user if the inserted card's reported rating falls below the application's minimum requirement.
On 21 May 2009, Panasonic announced new class 10 SDHC cards, claiming that this new class is "part of SD Card Specification Ver.3.0". Toshiba also announced cards based on the new 3.0 spec As of December 2009, the SD Association's Web site does not include information on this new class or new specification.

× rating

The × rating is a unit of measurement equal to 1.2 Mbit/s. It is derived from the standard CD-ROM drive speed of 1.2 Mbit/s. Basic cards transfer data up to six times (6×) the data rate of the standard CD-ROM speed (7.2 Mbit/s vs 1.2 Mbit/s). The 2.0 specification defines speeds up to 200×, but unlike the class rating system, does not mandate that x-ratings measure the card's sustained write-speed. For most cards, the maximum read speed is typical faster than its maximum write speed, leading some manufacturers to use read-speed as the ×-rating measurement. Other vendors, such as (Kingston, use write-speed.[ This table lists common ratings and minimum transfer rates.
Rating Write Speed
SD Class
10× 12.0  
13× 16.0 2
26× 32.0 4
32× 38.4 5
40× 48.0 6
66× 80.0 10
100× 120.0 15
133× 160.0 20
150× 180.0 22
200× 240.0 30
266× 320.0 40
300× 360.0 45


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