Quote:
Originally Posted by Lauraq
sorry but my English is not good, I understand some of what you wrote but I did not understand if I can easily do the conversion to the same format safely?
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Use
Polish or Modify EPUB.
Those ONLY change what is set.
Conversion does more

, even if it is not wanted.

Do not use the OS to move books from the Library folder.
Calibre updates the copy AS it Sends. Use Calibre as intended.