yaazzz
I am using verion xu4 5.11, booting from a 16GB sandisk SD card. The xu4 is definitely set to boot from SD, checked a couple of times! The power supply is the 5v/4a one that comes with the xu4. It's a 2pin plug but since I'm from the uk they have provided a 3pin adapter for it, if that makes a difference. Thanks guys!