Thread: Kindle Paperwhites - Gen 7 vs new Gen 11?
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Old 08-20-2022, 02:44 PM   #5
j.p.s
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Quote:
Originally Posted by shamanNS View Post
Because some years ago Kindle firmware has changed the way it names ".sdr" directory where it keep two "sidecar" files ( .azw3f & .azw3r) that contain info for notes and highlights and also for those 2 files inside the sdr directory.

Old behavior was "book_name +.sdr" and newer behavior is "book_name + some_id_thing +.sdr". IIRC that id/hash string of characters is unique for each device.
I think the id hash is based on the account rather than the device. There is a post somewhere on the Developers Forum that might even document the algorithm.

In any case, I just checked a book that I have in 2 kindles, and the hash is the same.
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