Originally Posted by Haesslich
Never do do it through the Kobo - that may be the issue. I'd try using the BB to format, then pop it back into the Kobo.
Seeing as the computer is the one controlling the format, I fail to see what logic is behind not formating the sd card while its inserted in the Kobo. The only thing that comes to mind is a fluctuations in the voltage causing issues. Would you Care to elaborate as to your suggestion of never formating while in the kobo? I am curious about the logic and reasoning behind this.