SanDisk has responded to the growing demand from power users of the popular Sony PSP (PlayStation Portable) by introducing <A HREF="http://www.sandisk.com/Corporate/PressRoom/PressReleases/PressRelease.aspx?ID=3434">a 4GB SanDisk Memory Stick PRO Duo</A> Game card that can store up to 64 hours of MP3 music tracks, 20 or more hours of movies/videos/film trailers, 12 hours of game saves, or 4,000 digital still images. The 4GB card, which is expected to ship this month, carries a suggested retail price of $219.99. Other capacities in the Memory Stick PRO Duo Gaming Card line include 256 megabytes, 512MB, 1GB, and 2GB.