Hey everyone. I'm currently started using calibre to organize my library. My device is Kobo Libra 2.
The transferring book to the device works fine but whenever I reconnect my device to PC, the device library is always empty except for the already default bought book which has come when I bought the book.
Any ideas about what I might be doing wrong?

Maybe Kobo stores its books in some specific folder? Some of my books are a free ebooks I have downloaded.