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 Folks looking to move away from Amazon but that still want to use their Kindle should check out Calibre and it's ecosystem. Helps ensure your amazon device doesn't become e-waste.

https://github.com/crocodilestick/Calibre-Web-Automated

GitHub - crocodilestick/Calibre-Web-Automated: Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up!

Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up! - crocodilestick/Calibre-Web-Automated

GitHub
@FoxxMD @dangillmor Folks looking to move away from Microsoft don't want to go to Microsoft GitHub to see solutions.
@FoxxMD @dangillmor Yesterday we, well Jacqueline did the real work, downloaded all our Kindle books to the netbook, and then converted them all to epub and PDF via EPUBOR. it requires an older Kindle version, but gives the link.
It's a two steps process.

@dangillmor And here is the link to the download page for your kindle purchases...strangely, all of these articles seem to omit this vital piece of information

https://www.amazon.com/hz/mycd/digital-console/contentlist/booksAll/dateDsc

On each book Click on "More Actions" -> Download & transfer via USB

Amazon.com