You can't add a rar file, containing several books, to the calibre library. Calibre can, under some circumstances, add compressed files containing a single book. Indeed many book formats are just this, a compressed archive containing a single book.
Extract the books from the rar file and add them as separate files.
Also, please note that all the books you add to calibre will be copied and renamed and stored in the calibre library. So there has to be sufficient room on the disk where the calibre library is stored, for all the books.
Last edited by Adoby; 07-12-2013 at 12:12 PM.
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