Before erasing and partitioning your Kobo always back up your SD card and make sure you have an image of your Kobo drive before beginning this process.
I no longer own a Kobo Glo and do not have any Kobo images. The best place to find help with Kobo images or a bricked device are the forums at https://www.mobileread.com/forums.
You will need:
- Kobo Glo HD (or other Kobo model that uses microSD)