Quote:
Originally Posted by madelonw
I got the error asking if I wanted to rebuild my Calibre database... I said Yes.
I had 13,000+ books cataloged. Now I have 810. I am using version 2.0 (I know there is an update, just haven't gotten around to installing it.) I am running 64-bit Calibra on a Windows 8.1 laptop. My Calibre folder lives on an external hard drive. I would add that I have added several custom columns to Calibre, all of which are still there.
I still seem to have all the folders in my Calibre folder, and I see the following files:
.driveinfo.calibre
.metadata.calibre
metadata.db
metadata_db_prefs_backup.json (which appears to be editable with a text editor)
metadata_pre_restore.db
Short of starting all over with a totally new database and adding all the books from my Calibre folder back in, is there a way to get back to where I was.
  
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The RED
should not be there, those are device only files. Someone has been messing beneath the skirts

and probably done additional harm.
The green is normal (and is the heart of the Library GUI)
Author folders with titles (index_number) inside those
The last is probably from a restore attempt (not usually leftover)