when i save all files to 1 folder
when i save books to one folder
why do i get .jpg files and .opf files? i have a lot of books and i just delete them, because i do not know what 2 do with them? it takes hours...and then more hours to delete them again from the re-cycle bin.
i think i only want .epub,.azw3,.mobi and .pdf formats. i split them to different folders (the epubs anyway) and then load what i want to phone and tablet.
why does it export those types? how do i use them?
i have over 300,000 books in calibre.
i export by author 4 times a-c d-h i-q r-z (60,000 to 90,000 in each).
tks Greg R.
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