Okej, thanks for the explanation. I want to understand and build a good routine from the start, since along the way I will end up with a big archive of books. With my 20 book it's easy now, but when I have 150 in different language and a lot of genre/subgenre, then I want it to be easy to sort them and find them on the device. And since electrical devices generally breaks down sometimes or I will probably end up buying a new better one in the future, I also want to secure a good backup and restore system.
I've learnt a lot through this forum and I'am very greatful to you all for answering my question.
Is it possible to change the default destination folder before sending to device? I would like to at least have a "Book" folder to separate the books from the kobo folder on the device.