File uploads (PDf and doc)

But is it possible that a PDF or DOC (docx) file is saved and the url is displaying to the content field

yes, that exactly what happens when you map a file field to a meta field

the file gets automatically saved in the medialibary then or on a other place on the server?

in the wp-content/uploads folder

is it possible to change that folder?

sure, the plugin uses WP core functionality to upload/store the file, namely the function wp_upload_bits(), which has an inbuilt filter to modify the path.

See this stackexchange answer.