Putting music on a small memory card is actually a pretty good idea. I wonder why it took companies like SanDisk with their new SlotMusic cards and Sansa Slotmusic player so slong to come up with it. CDs have been around for a long time now, almost 30 years. But CDs are easily scratched. Memory cards can’t be scratched and can be used for over 100 years says Sansa Accessories. You can also add more music to these memory cards as they’re essentially just MicroSD cards. One downfall I can see with these new cards is that they’re so small that they would be easy to lose compared to CDs.