Actually, if my math is correct the ratio of storage to size of a 128GB Micro SD is still greater. In two dimensions, for simplicity's sake, since a micro SD i

Actually, if my math is correct the ratio of storage to size of a 128GB Micro SD is still greater. In two dimensions, for simplicity's sake, since a micro SD is obviously slimmer than a regular SD: 512GB SD = 768mm^2 128GB Micro SD = 165mm^2 SD = 0.667 GB/mm^2 Micro SD = 0.776 GB/mm^2 If we add the third dimension the efficiency of a Micro SD will be even greater compared to a SD. Source: http://en.wikipedia.org/wiki/File:SD_Cards.svg http://en.wikipedia.org/wiki/File:SD_Cards.svg