To gain access to courses placed into an archived or frozen
status, under the "My Courses" tab change the "In Progress" dropdown
to "Past" to see the page.

On your
course page, and provided you are using a teacher role, navigate to
the "More" dropdown options and select
"Download instructor
files".

This will download a .zip folder
containing your materials to the Downloads
area of your computer. (There may be a
popup on your browser to automatically
take you to this location)

On Windows, if you double click
on this .zip folder the contents will
open. From there you can hold left click
on the item you want to extract and drag
it to the Downloads folder as highlighted
below

Your item will then be visible in
the Downloads folder and you can re-use it on
a new Moodle course page

Alternatively, if you are using
a Microsoft Windows device, you can right
click on your item in the downloads folder
and click "Extract All"

This will open a new pop-up
window and you just need to click
"Extract"

Since the "Show extracted files when
complete" option is selected by default, a new
folder will promptly open containing all of
your content and you can re-use the material
as you see fit.