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Old 09-19-2023, 06:01 AM   #1
ichnilatis
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Posts: 179
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Join Date: Jul 2020
Location: Greece
Device: Pocketbook Touch Lux 5
Transfer EPUB files

Hi,
I would just like to ask a question. Excuse me if it has already been answered.
When I transfer an EPUB book from calibre to my ebook reader, three files are displayed: the epub file, the cover in jpg format and a .opf file. Are all these files necessary? I usually delete the jpg and opf files and all seem to be ok; there is no problem with the book.

Thank you!
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