Now we have the slightest idea as to why Microsoft isn’t allowing us to swap out that on-board 8GB micro SD card to something larger. As much as the HD7 is stuck with its micro SD card, expect the same with the 7 Mozart. But, if you’re really desperate to have that 8GB go miles, you’ll just need some friendly tools like let’s say, a screwdriver, a hobby knife and a pair of tweezers. And after the teardown, you’ve got yourselves that Sandisk 8GB micro SD — marked by the arrow in the image above. The question now is, are you willing to ditch that warranty (as well as the phone itself) for that memory upgrade?