The Restore_PC folder on any Hanlin clone should be hidden and not visible to the reader. It contains what are essentially bookmark and last position information on files that have been opened previously.
The exact data in the files depends on the format of the book it refers to.
As a folder it can get a little bloated because the files within it do not get deleted when the books they refer to are moved or deleted so from time to time I just purge this folder in the interests of general housekeeping. You won't cause any serious damage even if you delete the folder and let the device re-create it.
BobC
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