I think it's just the picture - it's listed as 8 pins. The datasheet won't load - the microwave is on see, of which my router is cleverly sat next to. Long story.
I loaded the datasheet and it was 16...
Why the point re FAT file systems? Does the SD library use it?
Crossroads, we've got on to talking about using external flash to store logged data as opposed to SD cards.
Please note that your going to end up coping everything to and from internal sram constantly so your not necessarily during yourself a favor trying to use offboard sram.