Originally Posted by HarryT
Really? So if you have two Kindles, you have to download the files twice - once for each Kindle - and the file for one Kindle won't work on the other? Doesn't that make it somewhat difficult to keep personal backups of your books on your PC, for example? How do you know which file is for which Kindle?
You've got it. Indeed, backing up the Kindle books to your PC is almost pointless unless you strip the DRM from them.
Otherwise, if you get a new device, you redownload your previously purchased books from Amazon once you register the device. Since Amazon keeps a library of all your Amazon purchases this isn't an issue.