Sandisk Extreme III 4.0GB SD card

Serious professional photographers who demand one of the fastest, most rugged, and most durable memory cards on the market should choose the SanDisk Extreme III SD card. Built to work under the most challenging conditions, with SanDisk Extreme III you’ll get more speed, better performance, and unmatched reliability.

That’s because only SanDisk Extreme III memory cards feature innovative ESP Technology for the fastest speeds and highest performance. ESP stands for “Enhanced Super-Parallel Processing”. Simply put, it means you are getting the fastest read/write speeds available – an amazing minimum 20MB per second sequential read and write speed – speed you’ll definitely appreciate whenever you find yourself shooting and storing pictures in harsh environments, extreme temperatures or at high altitudes.

Every SanDisk Extreme III SD card comes with RescuePRO so you can recover images, documents, mail, video, music – just about any digital file, with ease. Built with leading-edge media recovery algorithms, RescuePRO lets you preview recoverable data before you try to retrieve it. With RescuePro’s unique recovery algorithm for MPEG audio and MPEG video recovery (MPEG-1/2/3) what you see, and what you hear, is what you can recover. 

Key Features

• Fast 20MB/sec sequential Read/Write speeds
• Ideal for demanding photo shoots under severe weather conditions – heat, cold, wind, rain, snow, etc
• Durable, reliable and thoroughly tested for heat, cold, shock and vibration
• Class 6 speed performance rating ( based on SD 2.0 specifications)
• RescuePRO® data recovery software - ensures your photos will always be there
• SanDisk's lifetime limited warranty (EMEA: 10 year limited warranty)

What is SDHC?

To support the higher capacity needs, SD cards are now requiring a different design. The SD 2.0 specifications which supports 4GB and up, is called Secure Digital High Capacity (SDHC). The SD Association has created and defined 3 speed classes to help you identify speed and performance capabilities/minimum requirements of SDHC cards and their SDHC host products.

Cards address data (read and write) at numerous speeds. Many factors impede this performance. SDHC guarantees a minimum read and write speed necessary to handle recording high quality video and audio. The maximum card speed may vary, but you can always depend on SDHC cards to meet your SDHC host product's high quality performance requirements.

Note: Because SDHC works differently (supports the new higher capacity cards) this card format is not backwards compatible with legacy SD format host devices.

The SDA speed class rating was developed to identify minimum data transfer and latency requirements for a host application and provide a means for consumers to match those requirements with an appropriately rated SD card. For example, in the emerging application of real-time video capture (camcorders, camera phones etc), in order to ensure smooth capture and playback of video, the camera buffer RAM must never experience a data over-run or under-run. This requires that the card communicate certain parameters to the camera and then meet some minimum governing parameters. An SDA speed class rating of 6 means that the card will be able to transfer (with specifically defined latencies and data allocation units) data in a random fashion without interruption. Consumers should look at the intended host device to select the correct speed class rating in the card they buy. Since speed class 6 is currently the highest rating defined by SDA, it doesn't necessarily mean that a speed class 6 is the fastest card that a consumer can buy for all applications.

By contrast, SanDisk's minimum performance rating of, for example, 20MB/sec on Extreme III cards states the performance level that those cards will deliver for sequential write and read operations in non-real-time applications such as file transfers between a card and a computer or in digital cameras between the camera's buffer and the card. In this case, the statement of performance allows customers to make a relative comparison between cards of differing performance and price points. SanDisk Extreme III cards are also speed class 6 rated.