I use the SanDisk 6-in-1 pictured here. I did have to give it a firm push to make contact, but aside from that, I'm happy to report no problems. It didn't really matter to me--I didn't have alot of extra memory cards of any type and I needed to buy one in the 2 Gig size. It all hinged on price. It was just a matter of which one dropped to a price point that worked for me. I do happen to have everything in one master folder, then by artist, then by album name...but I don't know if that makes a diff or not.