Thread: Troubleshooting How to restore manual backup from Android Kindle App
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Old 05-02-2020, 06:16 PM   #4
jhowell
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Posts: 7,107
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Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Amazon syncs annotations for personal documents that are downloaded from your account. I just tested it with a personal document on the Kindle for Android app and it worked for me. Highlights I made there appeared in the same book in Kindle for iOS on my phone. Syncing will not work if you sideloaded the book by copying the file instead of downloading from your account using the app.

To answer your question, I don't know how Kindle for Android stores annotations. I suspect they are kept in the private app storage that is not accessible unless your device is jail broken.

Regarding the files you found:

.prc is the book itself
.ser is a search index
.ticr is data related to time left in book/chapter
Last edited by jhowell; 05-02-2020 at 06:26 PM.
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