How Do Compact Flash Memory Cards Work?
Compact Flash Basics Compact Flash memory cards, commonly labeled “CF Cards” in retail stores, are small, portable storage devices. You can use these cards in many electronics, including digital cameras and MP3 players. Many computers have built-in Compact Flash card readers, which allow the cards to be used for backup storage, as well. How Data Is Stored Like other flash or solid-state memory units, Compact Flash memory cards use electrical currents to write information to tiny “blocks” inside the card. When changes are made to the information, by adding new files or deleting old ones, the electrical impulses move through the blocks holding that data to erase and/or write. The data stays in the blocks until you make changes, even if the card has no power source. Usage Limitations If you have ever used a rechargeable battery, you know that you can only charge it so many times before it stops holding power. Compact Flash memory cards are the same way in regard to writing information. Ea
