The User private backup area stores manual backups (mbz files) created by the user. The backups found in the user private backup area are created from the manual backup process by the user, as a teacher in a course. These backups are different from the automatic backups of AsULearn courses that ITS Academic Technologies makes every night.
Many of these backup files are created to restore a course and may no longer be needed. These manually-created backups in the User private backup area will be kept for 30 days. However, you can download these files from the user private backup area if you wish to keep them.
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