All the pins of this sensor module are digital, except VCC and Ground. -> GND is the ground pin of the micro sd card module and it should be connected to the ground pin of the Arduino.

Unlike the other microcontroller stuffed in an SD card platform — the Electric Imp, [kodera] is, for the most part, respecting the standard pinout for SD cards.

It turned out the SDIO mode on [Severin]’s card was broken, but accessing it with an Arduino and SPI mode worked. There was finally hope to get files off this damaged card.

The module (MicroSD Card Adapter) is a Micro SD card reader module and the SPI interface via the file system driver, microcontroller system to complete the Micro SD card read and write files. Users ...

A maker developer has squeezed an Arduino onto an SD card. He was inspired by Intel’s Edison compute module and he tried to go one better. The result is the SDuino, an ATMega328P processor-based ...