Well, I just spent $11 and about 3 hours learning something about MicroSD cards. All MicroSD cards are not made the same. I went up to my local Radio Shack and bought a 4 GB MicroSD card. Turns out that it was a MicroSDHC card. It has the same physical structure as a MicroSD card, but it's a high capacity card. Newer PC readers and cell phones and such can read these fine. But older readers can't read them at all. It appears that the Spinneret MicroSD card slots are of the older type and won't read / format the MicroSDHC cards. I think this is at the hardware level or in the onboard driver since it seems to be a factor in part of whether it can read FAT 32. Now, if I had a newer card reader on my PC, I could probably re-format it as a standard MicroSD format ( Fat16 instead of FAT32 ) and it would probably work ok. But not having one, the cheaper route was to just buy a new card.