Archived materials remain available here for 5 years. Prior to Fall 2012, archived courses are available only to course instructors. Beginning in Fall 2012, instructors can choose to allow students access to courses beyond the end of the term, up to the retention period.
Policy for site archiving and retention: http://www.oit.umn.edu/moodle/policies/index.htm
If you wish to retain the site content for your own records, please back up your data locally by following the instructions here: http://www.oit.umn.edu/moodle/instructor-guides/backup/index.htm