AA1 110 comes with Intel 8 GB flash Disk, which uses the ZIF IDE interface. It can simply be replaced by any 1.8” ZIF drive, most commonly used in IPOD classic and IPOD Video player. These drive can be expansive due to limited availability and use but can easily be found at IPod repair shops. I found 30 GB Toshiba about 30 US $.
Toshiba HDD installation is straight forward, Just plug the ZIF ribbon cable into both ends of HDD and motherboard, keep in mind Toshiba use a different ribbon cable than Hitachi, the HDD end of the cable is slightly thinner then the other end and coated with white tape.
I attached the hard disk into motherboard by double sided duct tape, and two more pieces of white masking tape on tope of the HDD for more safety.