When you delete activities and resources in Moodle the items are placed in the Recycle bin for 7 days. This will allow you to restore these items back to your course if you have made an error in deleting an item from your course.
Click the More drop-down menu from the secondary navigation.
Select Recycle bin.
Click the Restore icon(s) for the activities or resources you wish to restore to your course.
Click the Delete icon(s) for the activities or resources you wish to delete permanently.
Click Delete all at the bottom if you wish to delete all activities and resources in your recycle bin permanently.
All items will be permanently deleted after 7 days.
If you wish to recover an item that has been permanently deleted you can request the most recent course backup file for your course by submitting an OLET ticket.