Quote:
Originally Posted by GeoffStorey
On my old Kindle, the book is a folder containing two files - an MBP1 file and an MBS file. When I try to add the book, I get the message "No items match your selection".
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Those are not book files.
The actual extensions for book files on the device will vary based on the model of your older Kindle. Some examples are .azw, .azw3, .kfx, .mobi, and .prc.