For what it's worth, I have a 2 gig card and recently bought a 4 gig card. If you mostly want to use the 4 gig for music with automatic advance, it might be better than my experience. However, with books from Bookshare in several folders, using the notes folder, and moving around the card in general I found the 4 gig card slow enough that I went back to the 2 gig card for everyday use. Just my 2 cense worth Make it a great one Sharon