Datasheet

The official SD formatter is available from https://www.sdcard.org/downloads/formatter_4/

Download it and run it on your computer, there's also a manual linked from that page for use

Download the official SD Formatter software for

Windows

https://adafru.it/cfL

Get Card Info

The Arduino SD Card library has a built in example that will help you test the Wing and your connections

Open the file CardInfo example sketch in the SD library:

This sketch will not write any data to the card, just tell you if it managed to recognize it, and some information about it.

This can be very useful when trying to figure out whether an SD card is supported. Before trying out a new card,

please try out this sketch!

Go to the beginning of the sketch and make sure that the chipSelect line is correct.

On ESP8266, the SD CS pin is on GPIO 15

On Atmel M0 or 32u4 it's on GPIO 10