Quote:
Originally Posted by tomtc
Doh! You are correct. It does all go. I must have had duplicate files from some previous iteration - there was a time before fully understood the file structure and how books were added when I had been putting books straight into the folder thinking Calibre would pick them up somehow. I know...I know. Thought I had cleared that all out but perhaps not.
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So just export the library to a new library and only books with valid database entry will get copied (or moved).
Then switch on the "Size" column, sort by size and remove the largest books, or at least have a look at them and remove un-needed formats. You might have the same book in several formats, such as mobi and epub. You only need one of those on the card.