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Originally Posted by ShellShock
Does anyone know why kepubs are so much bigger than epubs? What are Kobo doing to justify this bloat?
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The kepub file itself is not always much bigger than the epub, but a lot more data gets stored in the database for a kepub than for an epub. I don't know what it all is for, but some is probably to do with the Kobo DRM scheme, and some to do with the bookstore (links to similar books, etc.), and more detailed statistics. Also there is BeyondTheBook data such as author photographs, etc. that epubs don't have.