If you buy the eMMC module with ODROID-X2, ODROID-U and ODROID-U2, it comes with a small PCB. We call it eMMC reader. (center of below picture)
To write an OS image, you must assemble them as below pictures. OS images can be found in our "Download" menu of this homepage.
It's time to put the USB memory reader into your PC. And write the lastest OS image to the eMMC storage. Refer below link to know how to do it. It is very easy and simple. http://www.hardkernel.com/?b130
Please note below items. - Plug the reader board into USB memory reader as deep as possible for the stable connection. - Assemble the reader board and eMMC module tightly. - Some portion of eMMC protected/hidden blocks(about 8MByte) are not accessible with the reader.