If you use Send To Kindle to send your side-loaded doc to send to your device (and so it is stored in your Amazon cloud storage), then you can use any recent Fire, or the Kindle app on Android or iOS to Export your 'notebook'.
For some reason, this option is not available on Kindle (even though your notes will be stored there), and it won't work with side-loaded files since the implementation requires syncing notes to the cloud, where a server process gathers them up and sends them as an email attachment to the email address that you use for Amazon.
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