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How to Convert GPT Protective Partition to MBR Style?

What is GPT?

When we buy a new hard drive to expand the storage space of computer, we will need to initialize it to MBR or GPT style before use. Many users may be familiar with MBR (Master Boot Record), because it is commonly used and it supports all versions of Windows.

While GPT is the abbreviation of GUID Partition Table, which does not support Windows 2000, Windows 2003 32 bit, Windows XP 32-bit, and this is the main reason why many people cannot access GPT disk and can only see "GPT protective partition" in Windows XP built-in disk management. However, GPT disk still has many advantages. For example, it breaks the MBR disk limitations of 2TB disk size and four primary partitions at most. The main advantage of GPT is that the disk size can be up to 256 TB, and a GPT disk can have 128 partitions at most.

If a hard drive was initialized to GPT disk in Windows 7, when plugging it into a PC with Windows XP, it cannot be used and the drive will shows up as a GPT protective partition. Under this condition, we have to covert it to MBR style.

How to covert GPT to MBR?

With the clean command in Diskpart, we can delete GPT protective partition. However, this method will erase all data on the GPT disk. Are there any other methods that can covert GPT to MBR without data loss? AOMEI Partition Assistant, as an all-in-one and easy-to-use disk manager, can do it easily. First, we need to free download Partition Assistant and install it. Then do the following steps:

  1. Launch this software.
  2. Right click the disk and select Convert to GPT/MBR Disk.
  3. Confirm the operation and click "OK".
  4. Click "Apply" on the toolbar to commit the operations.
    Main Interface

Note: Because of the motherboard's firmware interface is different between MBR and GPT system disk, the OS will no longer boot if convert a system disk. So any system disk does not support being converted between MBR and GPT.

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