I perform an image of the Kobo every couple of days. I use O&O Disk Image to image the Kobo, and I keep the image on a CD RW. I have already had to restore it, it was when I opened the Kobo and a blank screen greeted me, saying "No Books". Glad I had a current image to restore!
Seagate has a nice free drive cloning tool called DiscWizard. It is made by Acronis, a well established backup software company.
DiscWizard:
http://www.seagate.com/www/en-us/sup...ads/discwizard