How do I configure automatic cleanup of backup files?
Purpose
By default, NSP policies are configured to automatically delete backup executions that are older than one day, and backup files that are older than 30 days. You can configure the policies to alter or disable the automated file cleanup. The backup file cleanup policy only applies to backup files that are stored in the NSP file system; backup files stored in other locations (for example, on the NE) are not affected.