A memory card (also called a flash memory card) is a solid-state electronic 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 also in many applications where a large amount of data has to be stored either once or continuously like in data loggers. Memory cards are small, rewritable and are able to retain data without power. In this article we will use the SPI bus to write and read from an SD card using mikroC SD Card libraries