Hello:
Interesting thread! I found this little program:
http://www.softpedia.com/get/System/...mat-Tool.shtml to quickly format the uSD card to FAT32. To use the program, right click on the executable and 'run as administrator' (OS: Win8.1). I used a SanDisk ultra micro sdxc 64gb in the following devices and they all worked, reporting around 59.1 gigs (or slightly hire) capacity: Kobo AuraHD, Kobo Glo, Sony PRS-950 and the JetBook Colour 2. I am sure other uSD brands will work too, I will test an ADATA 64gig later in the week.
Best,
Shunter
SanDisk ultra micro sdxc 64gb