If you want to understand how to fix Disk Unknown Not Initialized, start with confirming that the drive is properly connected. Test connecting the device using another cable, USB port, or another computer to eliminate any issues related to this part of the process. Then launch Disk Management in Windows and confirm that the device is shown with Unknown and Not Initialized statuses. For brand new disks, initialization via GPT or MBR can be considered for preparing it for operation. Yet, in case of drives that store some information on them, Initialization should not be used as it can impact the ability to get access to the existing information.
