When I back up, I just highlight everything on the kobo drive, Right Click hold and drag to desktop or somewhere, let go and then click on 7-Zip and then Add to... Zip file.
Then if I reset and I need to restore, I just unzip the file to the Kobo drive. Everything comes back exactly the same as it was before, except I do have to connect to Wi-Fi again. This may work for you on the external sd as well.
Another option is to image the card using like win32diskimager , restoring to the larger one and the stretching out the partition using like minitool or something afterwards.
Last edited by freekobo; 09-02-2016 at 05:57 PM.
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