Performing backups is great, but backups are only useful if you can use them to restore files and folders. The reasons for restoring include recovering from a major system disaster, recovering from a single disk failure, or just restoring a file a user has inadvertently deleted.
In the previous recipe, you saw how you could mount the VHDX that WSB created for you and give it a drive letter. So one way to recover the file is just to mount the backup VHDX and then use Explorer or other tools to copy files from the backup to a new home. This recipe uses the WSB cmdlets to recover to a separate folder. You would do this if you wanted to recover some particular files and did not want to overwrite anything.