Change how to saved book in disk when add book

Hi,
When I added book(s) in calibre, I want to save all books in one folder "Calibre Library" in format "title - auther" and save corresponding metadata and cover in same name "title - auther". For example, "matlab by example" by "edward singh" saved in disk like this:

D:/calibre library/matlab by example -edward singh.pdf
D:/calibre library/matlab by example -edward singh.opf
D:/calibre library/matlab by example -edward singh.jpg

How can I do that?

thanks in advance.