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Originally Posted by mmat1
Btw. i've never heard of a reader that has this ridiculous 300k (260k ?) limit other than Sony
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I don't know if the Nook devices themselves have the file size limitation, but the 300 KB file limit is mentioned in the Barnes & Noble
PubIt! ePub Formatting Guide:
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VII. Files
Content should be organized into separate HTML or XHTML files. For example, Title_page.xhtml, Contents.xhtml, Copyright.xhtml, Dedicatio.xhtml, Chapter_One.xhtml, Chapter_Two.xhtml, etc.
Each file should be less than 300kb and listed in the <manifest> of the OPF file. Files contained in the ePub but not listed in the <manifest> and files listed in the <manifest> but not contained in the ePub will interfere with nook performance.
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I just finished formatting an ePub for my husband today. I noticed that when the XHTML is not broken into separate chapter files, it takes longer for later chapters to come up when selected from the NCX Contents in Nook for Android app. The consolidated chapter XHTML file did not exceed the 300KB limit. This slight delay may be a good reason to break up the chapters into separate files even when they're not large.