Secure Digital cards, also known as SD memory cards, are small solid-state data storage cards used in many digital devices. When you insert the Secure Digital card into a computer with a compatible SD card reader, it appears as a removable drive. It also has a drive letter assigned to it like a floppy disk or CD-ROM. The SD memory card, also commonly referred to as a Secure Digital flash card, has the technology to write data without electrical power. They're ideal for use in small digital devices such as digital cameras, PDAs, digital music and video players, smart phones and video games.

Secure Digital memory cards allow the PC user the ability to store digital pictures, music files and other data. Conveniently, transfer files between digital devices and your computer or to digital photo kiosks and printing firms. It’s now common to find a 2 Gb Secure Digital card, or even SD cards that store up to 8 Gb.

Secure Digital cards have several formats:

1. MicroSD is the smallest card and has an adapter to convert slots built for the miniSD card.

2. The mini Secure Digital card, designed for use in cellular phones, has an adapter to fit card readers that reads/writes the regular-sized SD cards.

3. The most commonly used by PC owners is the Secure Digital memory card and the largest of the SD formats.


Action Steps
The best contacts and resources to help you get it done

Tips & Tactics
Helpful advice for making the most of this Guide

• When purchasing new computers, look for models that have a built-in card reader to make transferring files more convenient. Minimize the number of different types of cards by choosing devices (digital cameras, PDAs, mp3 players, etc.) with the same kind of memory card.
• Memory cards are small and easy to loose. Look for carrying cases designed to store several SD memory cards all together.
• MicroSD cards can't be used in devices that take a regular Secure Digital memory card.

The official source of Secure Digital Cards is the Secure Digital Cards page at Business.com