Auto recover creates recovery files for open documents after a specified number of minutes have elapsed. The recovery files are closed and deleted when you save the documents.
Backup stores a backup of the original document before any changes are saved to the file. The backup is one version before the last saved version of the document and named Backup of document_name. You can save up to 10 backups of each document.
If you save changes to an active document in error, you can bring the document back to the point before the changes by opening the backup file.
To set the backup folder: