I think the two available capacities are 16GB and 64GB, but the availability of the 64GB will probably be a bit more limited. Plus they will no doubt shaft you on the price of the 64GB. No expansion via SD card, which I think is inexcusable these days. I'm already down to less that 6GB free on the N950 and there's hardly anything on there. I suppose an extra 1mm of thickness is too big a price to pay for useful functionality. :/