If you have a Kindle and "bought" ebooks over the years, you have a week to download and back up your files before Amazon blocks you from doing that.

There are scripts (see the thread below) that will bulk-download.

It's a reminder that Amazon is a rapacious monopolist.

https://www.mobileread.com/forums/showthread.php?t=366171

Amazon is removing Download & Transfer option - MobileRead Forums

Amazon is removing Download & Transfer option Amazon Kindle

@dangillmor I just checked (in Australia) and there is no download link for any ebook I ever purchased. They're all pretty old so maybe they took it away a while ago, not sure.
@alansuspect @dangillmor I’ve never received any advice this was going to happen or has happened. What the hell?
@lizzieclarke @dangillmor nope I didn't receive any notification, this was the first I'd heard