[Dullahir]

Hey everyone, my question for this evening is:

When transferring books from one actual library to another, and selecting 'Delete files after copying', how would I get it to keep the .opf files so that if I were to add dupes by accident, it will alert me?

I know that I could perhaps just copy the books without deleting them, then after they were transferred, I could 'Remove all books of a particular format', but is this the only way? Also, will it still preserve the metadata even if the books themselves are not present?