I have a 4 GB Sandisk micro SD card with the SD adapter. The manual says this card should work. But the adapter is a hair too big -- just won't quite fit into the slot. I've heard that I need to get a mini SD card with adapter, and that would work. It sounds like, however, there might be a "micro to mini" adapter of sorts, so that I can still use my 4 GB Sandisk micro SD card.