- 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:)).