Hi,
I have put online a short tutorial on how to enable the SD cards and SATA under Android installed on NAND for A20-OLinuXino-MICRO-4GB
http://www.grozeaion.com/electronics/high-speed-photography/171-enable-sata-and-sd-cards-on-a20-olinuxino-micro-4gb-with-android-on-nand (http://www.grozeaion.com/electronics/high-speed-photography/171-enable-sata-and-sd-cards-on-a20-olinuxino-micro-4gb-with-android-on-nand)