What Is a Secure Digital Card?

A secure digital card is memory card format for PDAs, digital cameras and cell phones. It is a collaboration standard created by three companies: SanDisk, Toshiba and Matsushita. The format was introduced in 2000, and has become a very popular standard implemented across many different industries.

Format

In order to use the SD card for use with your device you have to format it with the FAT or FAT32 file system.

Digital Rights Management

The makers of SD cards conform to industry DRM for copyrighted material. You may be unable to store music or movies on the SD card without first having it approved by the owner of the copyrighted material.

Capacity

SD cards have capacities that have gone from two megabytes in 2000 to more than 32 gigabytes by the end of 2008.

Types of SD Cards and Features.

SD Plus has a usb port attached and can plug directly into a usb port of a computer. Capacity Display is an SD card with it's own lcd screen, so a user and check how much space is left on the device.

Speed

Current SD cards have a data transfer rate that matches the same rate of a local system hard drive.