A course import package is a .zip file of exported course content. Importing a course package into an existing course copies the content of the package into the existing course. Import packages do not include user enrollments or records, such as discussion board posts and assessment attempts.
Info Never upload an exported course package that has been edited since it was created and downloaded. Opening the .zip file and changing any of the files in the exported course package will result in unstable and unpredictable behavior when the course is imported.