Introduction The SD card v3.0 shield adds storage to your Arduino project. It supports SD, SDHC, or MicroSD TF cards. Use the on-board toggle switch to select the SD card type. The card supports use of one and only one format of SD card, either SD/SDHC, or MicroSD. Before using an SD or MicroSD card, please set the shields "SELECT" switch to the proper setting: toward the SD/SDHC slot, or the MicroSD slot. The SD Card shield v3.0 uses only the the SPI ports of Arduino. The shield is also stackable, so additional shields can go on top. There are Grove compatible sockets for the I2C and UART ports on board. The SD Card shield v3.0 makes use of pin 10 as a chip select. Please be sure other stacked shields do not make use of that same pin. See v4.0 of this shield for a version that uses pin 4. These next lines were user added: This shield works fine for the Arduino Mega 2560, you just have to make the appropriate connections. 4or10 ->53, 11->51, 12 ->50, and 13 ->52. This arrangement works fine so long as you make sure not to assign anything else to those pins. ![enter image description here][1] Features Arduino/Seeeduino compatible( Do not compatible with Mega) Grove compatible SD card, Micro SD card and SDHC card supportable 3.3v and 5v logical voltage compatible 2.6~3.6v DC power supply Specification Item Min Typical Max Unit Voltage 2.7 3.3 3.6 V Current 0.159 40 200 mA Supported Card Type SD card(