If your environment matches any of the following, the wizard can create a disk storage unit for you:
You can perform backups and restores with NetBackup by using a hard disk drive (or a portion of a disk drive). The wizard creates a NetBackup storage unit of type Disk.
The wizard sets default values for the storage unit.
See Default values for disk storage units.
You can use any location on the disk if sufficient space exists to hold your backup data.