Originally Posted by itimpi
I would suggest that a better solution is to:
- Use the Calibre 'Copy Library' to move all the files that Calibre knows about to a new location. This will get all the books that Calibre is happy with into the new location, and leave behind book files that are not referenced in the current Calibre database.
- Use the calibre 'Add Books' facility to add these left behind books back into the new Calibre library.
This tried and true method is what I would also recommend.