[crossi]

I have 2 kindles so to keep backups of my books I would need to add a book to calibre for one of them but then how should I backup the other? I don't think I could have two azw formats in the same book listing. Is there any point if fact of keeping any amazon format in the listing once I have edited the title/author to suit myself? Since with each new kindle I would need a separate format download why not simply delete all the formats and just keep an empty book? I don't know how to set up separate libraries for each kindle or how I could switch between them or how to copy the metadata from one to the other so I wouldn't have to do it twice.