Convert To GPT Disk in Disk Management

  1.  Data (D:) has data -> Make a full backup!


2.  MBR was created (2 volumes on Disk 1).  Unallocated volume cannot be extended on healthy volume due to MBR Disk (< 2 TB).


3.  Verify your backup!


4.  Delete healthy volume.


5.  Healthy volume deleted (2 unallocated volumes).  Right click on Disk 1 and select Convert to GPT Disk.


6.  GPT Disk converted, we now have 1 volume (> 2TB) on Disk 1.


7.  Created new simple volume.  Last step is restore data to the new volume (Data (D:)).