The companies were expected to unveil plans Monday to sell memory cards loaded with music in the MP3 format, free of copy protections.

Garmin nuvi devices that have a micro SD memory card slot are more flexible since the added memory can be used to store MP3 music or audio books for your long road trips.

SanDisk Corp unveiled a portable digital music system based on memory cards preloaded with songs, signaling a shift in its strategy to compete against the iPod.