My two cents:
I have several Sandisk microSD/microSDHC cards. A couple of 1GB “slotMusic” cards, a couple of 2GB cards, a 4GB and a 16GB. The 4 and 16’s are noticably thicker, with the 16 being the thickest. Larger capacities, the microSDHC ones, are thicker, by a very small amount. But I’ve never had any trouble putting any of them into my Fuze
Oddly enough, I first noticed this when I purchased a slotMusic bundle (ABBA) that had the cheap card reader. The 1GB and 2GB cards go in and can be easily removed from the reader. The 4GB and 16GB will go in, if forced, and are very difficult to remove. I pulled out my micrometer and checked, yes, the 4GB and 16GB cards are thicker. They all work fine in the slotMusic player itself. A later slotMusic card (Jimmy Buffett) came with the regular Sandisk card reader that works with all the cards. I don’t know if the reader was replaced with the different model because of this, or it’s just a coincidence.
