Memory Card-M2 Card, Sony or Sandisk 

Features:
1) Small: About the size of a postage stamp (24 x 32 x 2.1mm)
2) Secure: Built-in write-protect switch prevents accidental data loss
3) Flexible: Compliant with secure digital music initiative (SDMI) portable device Requirements
4) Simple: As easy as plug-and-play
5) Low battery consumption to maximize battery life in small portable devices
6) 1GB/2GB/4GB/8GB