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Old 03-08-2018, 11:32 PM   #1
ChipAHoy
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Question What is Original_epub vs epub and orignal_azw vs azw
some of my books in calibre show up with original_epub or orignal_azw, along with just epub and azw versions of the same title....the sizes of the "original" are different than the "unoriginal" version....

can someone explain that?
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Old 03-08-2018, 11:37 PM   #2
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These occur when you run a conversion where the input and output types are the same (e.g. ePub->ePub).
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Old 03-08-2018, 11:39 PM   #3
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If you converted, embedded metadata or polished books, Calibre saves a copy of the original ebook by default. The "unoriginal" is the edited version.
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Old 03-09-2018, 04:10 AM   #4
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You can enable/disable their creation with a Tweak, viz:

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Old 03-09-2018, 05:31 AM   #5
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There are times I have restored the original eBook. So it's a good thing to have. I keep the original until I am sure I don't need it.
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