[DNSB]

I was noticing that I seemed to be running out of space on my KA1 faster than expected. So I started looking at the files in my Calibre library and on my KA1.

I noticed that the files on the KA1 were between 600K and 1.3MB on the average larger than the files in my Kobo library.

I copied a couple of files back to my PC and found that for some reason, an OEBPS directory containing a copy of the cover image was being created inside the existing OEBPS directory when the file was being sent to the ereader.

I've attach a couple of images showing what 7Zip sees as the contents of the file. The cover image is 649883 bytes which, oddly enough, matches the size of the extra OEBPS directory.

Any suggestions as to why this is happening? Calibre version is 3.3, Windows x64 using the Kobo Touch driver.