I have a Sky3DS coming in the mail and I thought I'd get a head start and write some games to a 16GB MicroSD. The card works fine on other devices, but it's not working with this utility for some reason. I'm using Windows 7 and .NET 4.5.1 is installed. DiskWriter is running in Admin. Even tried it with the Win XP SP3 compatibility setting as well. At the bottom of the DiskWriter window it tells me that the SD card's total free memory is -24 Mb. Any attempt to add files to the card results in a 'not enough space' warning, even though the card is empty. I've re/formatted multiple times using Window's disk manager, SDFormatter, and the Diskwriter's Format option and still nothing. Any tips?