A memory card or flash card is an electronic flash memory data storage device used for storing digital information. They are commonly used in many electronic devices, including digital cameras, mobile phones, laptop computers MP3 players and video game consoles. They are small, re-recordable, and able to retain data without power. Flash memory cards have USB multi card memory card readers can read, copy, and backup data on memory cards, thereby providing a convenient way to access media by acting as a drive in which you can insert flash media cards.