@Gordon_Lau, do you have a directory named RoonBackups on your network drive? The directory starting with the “b” is typical of a directory name that is inside the RoonBackups folder, as seen in my RoonBackups directory:
You also should have a file named “roon_backup_root” in the RoonBackups directory. If this file also is not present, do you have any other Roon backups available to you?