You can hook up motocast and stream your music right from your computer using the "my music"  icon. That way you don't have to install a larger external memory. I've been using it for my commute. The only downside is that you get charged for streaming, but it doesn't seem to use that much.
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 love me my music. I heard rumors of 64gigs working too
 love me my music. I heard rumors of 64gigs working too