I have an older iPad Air, that has the Kindle app.
Over the past 3 years I downloaded a number of books - most NOT from amazon. I have books from different sites, that may not exist anymore - or books that were free and now the free versions are no longer available online.
All these books show in the Kindle app, on "Device" tab. They do not show in my Amazon account.
My iPad has suffered a fall, and also because of keeping it open, and in charger, to read or play games or watch videos... its battery is pretty much gone. I need to change the battery or something - which means, I need to back up my system. I expect every day my iPad will simply become a paperweight.. so I really want to back up all these books.
So far I found no way to get the books stored in the iPad, in Kindle app, to either a PC or my newer iPad. I have searched online and asked customer support - all I get is ways to share content already in the Amazon account.
How can I send the offline - on device - content from the old iPad to either a PC or another iPad or to maybe to the Amazon account (as documents maybe) ? Is it possible to do any sort of backup ?