Convert MBR to GPT/GPT to MBR without Losing Data

MBR and GPT are two different partition styles for disk. By comparison, the GPT is more advanced. It supports disk size more than 2TB, supports up to 128 primary partitions, and has no limitations to the partition size. So many users would like to convert a disk from MBR to GPT.

However, the GPT cannot work on all Windows operating system. So it is necessary to convert GPT to MBR in some cases. For either conversion, the Windows snap-in Disk Management and DiskPart can help, but you have to delete all partitions ahead of time. To get around of that requirements, AOMEI Partition Assistant could be the best choice.

  • It is able to:
  • Convert hard disk to GPT/MBR without deleting partitions or losing data;
  • Both system and data disk can be converted easily without data loss;
  • Convert disk to GPT/MBR without loading operating system;
  • Convert 3TB/ 4TB hard drive to GPT without data loss.

Why Choose AOMEI Partition Assistant?

Tutorial: Convert MBR to GPT without Data Loss

  • Step 1. Select "Convert to GPT Disk".

    Install and run AOMEI Partition Assistant. Right-click the MBR disk you need to convert and choose "Convert to GPT Disk".

  • Step 2. Confirm the operation.

    In the pop-up mini window, click "OK" to confirm the operation after everything is right.

  • Step 3. Click "Apply".

    Back to the main interface, click "Apply" and "Proceed" to commit the pending operation.


This process takes changing a MBR disk to GPT in Windows as an example. If you need to change a disk from GPT to MBR, right-click the disk and choose "Convert to MBR Disk".

Guides&Tips about MBR/GPT Conversion