OneNote offers three commands for importing files into a notebook. These commands are available on the Insert tab:
Attach File: Embeds files with a notebook. After you attach a file, double-click its shortcut icon to open it.
File Printout: Inserts files so that you can read and search (but not edit) their content in OneNote.
Scanner Printout: Imports scanned paper documents and digital photos into OneNote so that you can view their content.
Attach a file to a note to preserve a copy of a file or make the file available in your notebook. After you attach a file, you can double-click its icon to open it.
Attached files are embedded in notebooks; they are not linked to their original versions. ...