By Michael / Last Updated March 8, 2022

At the present time of information explosion, requirements for storage capacity become bigger and bigger. Especially those server deals with big data need a hard disk, the bigger, the better. People may configure a hardware RAID container in the past, but instead a few hard disks now. Because a hard disk can be achieved 4TB/8TB today. With the advent of a hard drive larger than 2TB, many users want to use a partition larger than 2TB since software and apps nowadays become bigger and bigger and eat up storage space fast. 

Not all machines support a partition larger than 2TB at the beginning. Some changes must be made.

The most fundamental concept of partitioning schemes is MBR and GPT. The MBR is an old-style which has limits that it only allows for a partition size less than 2 TB and allows for only 4 primary partitions. The GPT is new and has been developed to overcome these limits you may meet in MBR.

So, the first thing you should change is converting MBR to GPT if you want to make your partition size larger than 2TB. And according to the announcement of Microsoft, if you upgrade Windows 10 to Windows 11 with the "Check for Update" feature, GPT and UEFI is required.

If the disk you want to convert contains the installed system, please make sure that your system firmware is using UEFI (Unified Extensible Firmware Interface). The GPT boot function is available on your computer or server. And your Windows operating system must be one of the following:

  • Windows Server 2012 and 2012 R2
  • Windows Server 2008 and 2008 R2 (32-bit or 64-bit)
  • Windows 8 (64-bit)
  • Windows 7 (64-bit)
  • Windows Vista (64-bit)
  • Windows 11

Windows XP will not do, neither 32-bit nor 64-bit. When everything is ready, we can start converting MBR to GPT.

Convert MBR to GPT without Losing Data

When it comes to MBR to GPT conversion, generally, there’re 3 tools out there – Disk Management, DiskPart, and third-party software AOMEI Partition Assistant Server. Among them, Disk Management and DiskPart are both free Windows built-in utilities. However, in order to perform the conversion, there must be no partitions on the target hard disk which means all existing partitions should be deleted. Thus, there’ll be severe data loss. In this case, I recommend the AOMEI product.

With this AOMEI software, you can easily convert MBR to GPT or GPT to MBR in only a few clicks without any data loss. Meanwhile, other features like NTFS to FAT32 conversion, dynamic to basic disk conversion, and primary drive to logical drive conversion are also available.

How to create a partition larger than 2TB on Windows Server? First, you should convert MBR to GPT. To get it done, please try the best disk manager on the market!

Download Demo Server 2019/2022/Win 11/10/8.1/8/7/XP
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Step 1. Install and launch AOMEI Partition Assistant Server, right-click on the hard disk you want to convert and select “Convert to GPT Disk”

convert to gpt

Step 2. Hit “OK” to confirm the next operation.


Step 3. Hit “Apply” where the screenshot shows to commit the pending operation.


Wait a short while before it’s completed.

After you have converted your disk to GPT, you can extend your partition to larger than 2TB now. You can still use AOMEI Partition Assistant. The difference is using another function - “Extend Partition Wizard”.

Extend Partition Wizard


How do I make my partition bigger than 2TB? In this post, you learned under what circumstance could you create a partition bigger than 2TB and also, a powerful third-party software utility AOMEI Partition Assistant Server was introduced to help finish the MBR to GPT conversion without data loss. If you wish to provide billable technical services to your clients, you’d better try the software’s Technician edition.