8GB eMMC Module U Android for ODROID-U2/U3 (Hardkernel) 

Pre-installed Android 4.x for ODROID-U2 / U3. 
Ready to run from out of box

THGBM5G6A2JBAIR (or higher version) 8Gbyte eMMC Version 4.41interface with 19nm NAND from Toshiba. 
Read speed is up to 160MB/sec in the real world.