What's The Windows 7 Maximum Disk Size Problem and How to Solve It?

Posted by @Ivy

September 25, 2017

What is the maximum disk size on Windows 7, especially a hard drive over 2 TB, makes most users perplexed. Then you must be interested in its’ reason and solution.

What is the maximum disk size on Windows 7?

Up to now, maximum disk size on Windows 7 is the problem which STILL bothers the majority users. Next, we’ll get the information about it. Let’s see a situation as following first.

When you use Windows 7 Backup and Restore to back up system images which are higher than 2.1 TB, the Microsoft cannot work.

After seeing it, you might be wandering the reason:

That’s all be because Microsoft only support drives that are set to use 512 byte block as destinations for backups. It’s one of the reasons which limit the maximum disk size on Windows 7. Aside by byte information of your system, bit information of your system is a factor which can influence the maximum disk size.

Now, we can clearly get the byte and bit information of your operating system is the reason. Thus, if 32 is the bit allowed on your computer, the maximum hard drive is 2TB(2^32*512).  

Why do your computer have A 2TB limit on Windows 7?

Yes, you are right. The byte and bit information of your operating system are the reasons of 2TB limit on Windows 7. But that’s just one aspect. Except for that, partitioning scheme is the factor which can determine the accessible size of your disk. 32 is the number of block allowed on MBR disk while 64 is the number of block permitted on GPT disk. You can clearly know the maximum disk size on GPT disk is much larger than on MBR. So, the solution to solve Windows 7 hard drive limit size is to convert MBR to GPT.

What is the maximum partition size on Windows 7?

Aside by the problem of accessible size of the disk, users can still be bothered by the accessible size of partition on the disk.

In theory, the maximum of a partition depends on the number and size of cluster. Whether FAT32 or NTFS, the maximum partition size are supposed to be very large.

Unfortunately, to FAT32 partition, the format tool built-in windows 7/8/10 etc limit it to 32GB. That’s to say, you can’t format one FAT32 partition larger than 32 GB or you can’t format one NTFS partition larger than 32 GB to FAT32 Partition with disk management. But you can create one FAT32 partition over 32GB by a professional third-party tool like AOMEI Partition Assistant.

To NTFS partition will be much better. Because the NTFS partition’s size is 64, the FAT32 partition’s size is 32. As long as the cluster’s number is large enough, the size of NTFS will be very large. However, owing to the way NTFS file system handles allocation table, it’s limited to 2TB.

Anyhow, if your computer doesn’t have a compatibility problem, converting FAT32 to GPT will a better choice.

How to solve 2TB limitation on hard drive?

Step 1: Download AOMEI Partition Assistant, install and enjoy it.

Step 2: Enter the main page, click the disk and select Convert to GPT disk.

Solution to Windows 7 Maximum Disk Size

Step 3: In this window, you will receive a message like ”Are you sure to convert the selected disk from MBR to GPT disk? ”. If you ensure this operation, click OK to continue.


Step 4: Now, you can preview the result and then click Apply to continue.

Preview and Apply

Step 5: This is the last step. You just need to wait and click Finish.

Proceed Solution to Windows7 Maximum Disk Size

 After all the operations finish, the problem is not a problem anymore. Even if GPT disk can solve the maximum disk size problem, you still need to convert GPT to MBR in some cases.

How to solve 32GB limitation on FAT32 partition?

Step 1: Enter the main page, click the FAT32 partition and subsequently select Advanced and Convert to NTFS.

Solution to Windows 7 Maximum Partition Size

Step 2: Just click OK to enter another window.


Step 3: In this window, you are supposed to Preview the final result and then click Apply.

Preview and Apply

Step 4: If you are sure to execute this operation, click Proceed.

Proceed Solution to Windows 7 Maximum Partition Size

Step 5: Congratulation! You are in the last step of all the operation of converting to NTFS partition. As long as all the operations finish successfully, you solve the maximum partition size on windows 7.

Detail Operation

You can Convert MBR to GPT because of Windows 7 maximum partition size problem. Simultaneously, you can convert NTFS to FAT32 in some situations. Such as a compatibility problem on your computer.


The accessible size of both disk and partition can be solved by a great solution with the help of AOMEI Partition Assistant. Aside by these functions, it contains other powerful functions including Merge Partition, Resize Partition, Create partition