Okay, got a 64GB Samsung microSD, says "SDXC" on it. Formatted to Fat32 using guiformat, formatted to use emunand with emunand9, injected old emunand with Emunand Tool, dragged-and-dropped old SD's contents, Menuhax booted, got into emunand 10.3 with Rxtools.
Installed a small cia to test if...