High Speed SD Card

Most portable electronic devices, from cameras to cell phones to e-book readers, require the use of expandable memory for easily replaceable storage of information. Today, one of the most widely accepted memory card formats among consumers and electronics manufacturers is the high speed SD card format. The typical minimum write speed for these cards is 6 Megabytes per second. This is necessary for some devices like digital cameras which require such speeds to allow for smooth recording of videos or multiple image shots.

The high speed SD card was created specifically to enhance the capabilities of first generation SD cards and to allow for faster transfer rates. To determine the speed of a certain SD card, simply refer to the rating that is usually attached to the card’s label. As a standard, there are three classes of speed, Class 2, Class 4 and Class 6. The first generation SD cards received a Class 2 speed rating. These cards had a theoretical data transfer rate of 2Megabytes per second and are the slowest among the currently existing SD cards. The succeeding SD cards that got ratings of Class 4 and 6 are considered high speed SD cards as they respectively double and triple the transfer speed of their first generation counterparts.