647 on the fritz

Hello, I'm new to forums so I'm not sure I posted this at the right place. My Kobo 647 is on the fritz. I cannot add any books etc. I had lent it to a friend and when I tried to use it all the books were gone and now matter what book I try to add, it always says no books found. I've tried all the resets etc... If I access the kobo through my computer, there seems to be no files at all. If I go through the desktop app, it does not show up. The model is 8857A-KBN647. Would an SD image work in this case? :help: If an SD image is the solution, does anybody know where I can get it?



Thanks!