Warning: Converting a MBR disk to GPT partition schema will remove all its contents. Please back up the data you would like to keep before.

Here below the steps to convert a MBR USB Hard Drive before launching the Recovery Media Creation process:

1. Right-click on "Start" , the Windows logo on the bottom-left of the screen, or press the Windows key on your keyboard, to display the menu below:

2. Click on "Disk Management":


 

3. In the "Disk Management" window, the lower pane will display a list of available drives. Identify your USB Hard Drive:


 

4. Right-click any partitions on the drive and select “Delete Volume” or “Delete Partition”:


 

5. Click on the “Yes” button in the pop-up message box asking you to confirm the operation:


 

6. Repeat steps 4 and 5 for each volume on that disk

7. Once all the volumes will have been removed, the disk will appear as “Unallocated”. Right-click on the disk at the left and select the option “Convert to GPT Disk” in the contextual menu:


 

8. Right-click on the unallocated space and select the option “New Simple Volume…” in the contextual menu:


 

9. Click on the « Next > » button in the New Simple Volume Wizard:


 

10. Let the default volume size and click on the « Next > » button:


 

11. Let the default drive letter assigned and click on the « Next > » button:


 

12. Set the file system to NTFS and leave the Allocation unit size to Default. Enter a volume label, such as “MyRescueDisk”. Check the box labeled “Perform a quick format” and then click on the « Next > » button:


 

13. Click on the “Finish” button:


 

14. The new volume is now being formatted:


 

15. Your USB Hard Drive is now using GPT partition style: