Quote:
Originally Posted by chaley
Assume you make a copy today, and that the book The Doom of Horseflies is in your library. Tomorrow you delete the book, and the folders etc are removed from your library. You then do another copy backup. The book is not in your library and therefore won't (can't) be copied, but it is still in your backup because it was there yesterday. Your horseflies are still doomed.
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An even more common problem in Calibre is fixing title or author errors. Suppose you realize that you misread the title of the book when you first entered it and it was stored as "The Dome of Horseflies." You fix it to the "Doom" but now your horseflies are both doomed and domed in the backup. The same problem occurs when you fix an author. I have 20 books by one author, but the name may be stored as A.C. Clarke, Arthur Clarke, AC Clarke, A C Clarke, etc. When I spot that error, I like to get all the author names stored consistently, but using "Copy" for the backup leaves all the old versions, as well as the new ones.
I use a one-way mirror synchronizing program to keep my library backup.