A World Wide Name (WWN) or World Wide Identifier (WWID) World wide port name is a unique identifier used in storage technologies including Fibre Channel, Parallel ATA, Serial ATA, NVM Express, SCSI and Serial Attached SCSI (SAS).

Restoring from backup is unnecessary here as we dont know what exactly the breach affected.
Disclose incident is AFTER all other steps have been taken. The question states WHEN a data breach occurs.
Move the data to another location ... same issue. What data. Breach scope needs to be identified.
Identify the exploited vulnerability -- definitely
Disable ports and running antivirus scan between these two... antivirus should already have been running and this wasn't exactly a virus. So disable unnecessary ports is the only other option that makes any sense. Although this should have been done before this point. What should happen is that you remove the affected systems from the network but do NOT shut them off.
https://www.ftc.gov/business-guidance/resources/data-breach-response-guide-business

Scripts are written using a shell language. The shell is the server's command-line environment.
The default shell for Linux is bash. Windows has two shells: cmd.exe and PowerShell, although Microsoft emphasizes PowerShell. As a general rule, a script written for one shell, such as PowerShell, will not be understood by another shell, such as bash. The system must have the appropriate shell installed to process the script.
Bash script -- a script written in bash language that contains commands, variables, constructs, and other components. Bash scripts are almost always written for Linux systems.
VBS script -- a script written in the VBScript language. Microsoft has deprecated VBScript, but there have been many VBScript scripts written over the years. VBScript scripts are almost always written for Windows systems.

GPT was developed to replace the limitations of MBR, and it is part of UEFI development to replace PC BIOS.
So the Hardware has to UEFI compatible for GPT to be fully effective.

Disk Management displays whether a disk is online (available), or offline.
In Windows, by default, all newly-discovered disks are brought online with read and write access.
In Windows Server, by default, newly-discovered disks are brought online with read and write access unless they are on a shared bus (such as SCSI, iSCSI, Serial Attached SCSI, or Fibre Channel). Disks on a shared bus are offline the first time they are detected.
You would first need to bring online (available) then choose the partition and during this choose simple or spanned... etc. BCD are just options that you can choose later.
https://learn.microsoft.com/en-us/windows-server/storage/disk-management/manage-disks