I am trying to make a new/standby SD card for my iFly 740. I have done this successfully in the past, but today iFly Connect in my Windows 10 computer will not recognize a virgin 16Gb SD card. The Windows 10 system recognizes it ok and I can format it, but iFly Connect says that there is no SD card. Why is that? Must it be labeled in a certain way, or does Connect require the file structure to be in place? In other words, will it only work with an SD card out of my 740, or will it also work with a newly formatted card?