Quote:
Originally Posted by Hardboiled
It was my assumption that download and transfer would make available the latest format consistent with the device, tied to the device serial, i.e. if the book in question has enhanced typography, Wordwise etc. and your device is a recent generation, you will get the KFX file, which will give you the full functionality of the book. If you have an older device, that would be KF8, without those enhancements.
I have had no trouble so far this far with any book, this year, and all have been available for download and transfer too but then I have not bought a specific 23 release, with those enhanced features so far yet, either.
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So far download and transfer for USB transfer to a PW4 and PW5 gives a KF8 file. To get KFX, I have to download directly from Amazon to the device.
I suspect that jhowell is correct in that this is due to Amazon not having access to the KFX decryption key on the device when using the D&T via USB mechanism.