I haven't read PDF on my Kindle for a long time. AZW3 is the most convenient format for me.
@knc1, I might try your backup script. However I can't find an easy way to restore the system from such a backup.
What is the benefit of backing up, then restoring manually over simply reverting the firmware to 5.1.2 with Kubrick? I can think of two possible answers to this question:
a) the manual way allows to preserve all the installed modifications and preferences;
b) Kubrick restoration may fail, while manual restoration is more reliable;
c) something else?
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