We seem to be talking at cross purposes somehow.
If you want to restore external to internal somehow, that implies the internal is broken, bricked, whatever. But with a bricked device you can't install this mod so it's not possible. And if it's not bricked it can replace a scrambled OS by itself, this "brick recovery" feature is already built-into the Kobo without any mods at all.
So that leaves a backup mechanism (back up your current firmware, mods, database, books, everything). But for a backup mechanism you don't need to clone a card at all. And you don't need a mod to restore a backup. A backup of the firmware/mods (on the system partition) would simply be a KoboRoot.tgz that you can install like any other firmware update.
I could make a mod that creates such a backup.tgz file if there isn't one already.
Quote:
Originally Posted by Ken Maltby
If you mod created the contents of the external uSD card, from the contents of the internal uSD card, why/how could it not know.
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This mod copies data without really knowing what it's copying. It knows that the internal card works because that's the card it booted off of. It can't make such assumptions about the external card.