The Full SD Image is only for people who want to flash a fresh new SD card (all data will be wiped!). Use this file with an image flash tool like Win32 Disk Imager then put the card in your console and it will finalize the process on startup (partition resizing etc).

MD5-Hash: a293953afc2155b769f360c3382ec5d7

The Firmware Update should be used to upgrade a previous version of my custom OS but NOT the stock OS. Drop the file at the root of your card then unmount to update.

MD5-Hash:1dc3ab2fb22d9e2145678ec1634b76fc

Visit Drum78 on GitHub for the full documentation.