Format SD Card

Windows

     - Download the SD Association's Formatting Tool from https://www.sdcard.org/downloads/formatter_4/eula_windows/
     - Install and run the Formatting Tool on your machine
     - Set "FORMAT SIZE ADJUSTMENT" option to "ON" in the "Options" menu
     - Check that the SD card you inserted matches the one selected by the Tool
     - Click the "Format" button

Mac

     - Download the SD Association's Formatting Tool from https://www.sdcard.org/downloads/formatter_4/eula_mac/
     - Install and run the Formatting Tool on your machine
     - Select "Overwrite Format"
     - Check that the SD card you inserted matches the one selected by the Tool
     - Click the "Format" button

Linux

     - We recommend using gparted (or the command line version parted)
     - Format the entire disk as FAT