An SD card, also known as a secure digital memory card, is a widely used Flash memory accessory that enables you to increase memory storage in various mobile devices including cell phones and digital cameras. For instance, if your digital camera only gives you enough memory to store a small number of photos, you can insert an SD card in the SD input to increase the amount of pictures you may take with your camera. Once your SD card is full, you can import the photos to your computer. Writer Bio
