Quote:
Originally Posted by Loki_London
Do you know if Calibre's metadata.db automatically generates metadata.opf files for each book it contains if it can't find them? I'm curious now if the metadata.opf files actually transferred from the old laptop, or if Calibre just created them when it read the db.
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I believe it does.
I think it runs this in a background job and throttles the creation rate so that they only appear relatively slowly.
Not quite sure what might cause the actual ebook files to go missing. I would expect this to be due to some factor external to Calibre. One possible culprit is if you are syncing to cloud storage and that has gone wrong.