By AOMEI / Last Updated September 29, 2020

The necessity of making use of two unallocated space on hard drive

What is an unallocated space? A computer describes any physical space on a hard drive that does not belong to a partition as unallocated. This means that no programs can write to the unallocated space. For all practical purposes, the space does not exist in the operating system.

You can not utilize two unallocated space on hard drive, because they are not in your hard drive partition. For your computer’s best performance, making full use of your hard drive is the most direct way to reach the goal. So it is necessary to find out an efficient way to deal with two unallocated space on hard drive.

The ways to deal with two unallocated space on hard drive

In order to make two unallocated space on hard drive useful, you can create a new partition or expand an existing partition to deal with two unallocated space. And to realize this operation, you can use the Windows built-in tool Disk Management or a third party software for disk partition.

● Using Disk Management to deal with two unallocated space on hard drive

Step1. Right click My computer→Management→Disk Management.

Step2. Right click the unallocated space, choose New Simple Volume from the shortcut menu. Follow the wizard, and click Next.

Step3. Set the size of the new volume by using the Simple Volume Size. Click Next.

Step4. Choose a letter for the new volume, click Next. Check “Format this volume with the following settings” and “NTFS format”. Click Next. Click Finish to create the new volume.

Step5. After the new volume is created, now we try to merge the another unallocated space into this new volume. Right click the new volume, click Extend Volume in the pop up menu. You may find the option is grayed out because the unallocated space and new volume are not adjacent.

Tips: Having tried using Disk Management, we found its operation is complex. And it can not complete the extend function when the two parts are not adjacent.

● Choose AOMEI Partition Assistant as the tool to deal with two unallocated space on hard drive

AOMEI Partition Assistant is a free partition manager which has all-inclusive partition function. Compared to Windows Disk Management, you are not limited in many aspects. Such as, you can merge your unallocated space to the exist partition even they are not adjacent. Besides that, AOMEI Partition Assistant is easier to use than Windows Disk Management. Therefore, it is a wise choice to use AOMEI Partition Assistant to deal with two unallocated space on hard drive.

No matter which way you choose to make use of the unallocated space, the primary thing you need to do is downloading AOMEI Partition Assistant. Install and launch it in your computer.

Creating a new partition using unallocated space

Step1. Select one of the unallocated space, then select Create Partition under Partition Operations.

Create New Partition With Unallocated Space

Step2. And the program will pop up a window which says “Please specify the size for creating a new partition. You can set the Drive Letter and the New partition size of the new partition.

Specify Partition Size

Step3. You can preview the newly created partition. Confirm that all settings are right, then click Apply on the toolbar to commit the Pending Operations.

Click Apply

Notes: After having created a new partition with an unallocated space, there is another one need to deal with. Now you can do the same thing to this one. Or you can merge unallocated space into existing partition.

Merge unallocated space to the C partition

Step4. Right click the unallocated space, and choose Merge Partitions in the pop up window.


Step5. Choose the C drive as the drive you want to add the unallocated space.


Step6. Click Apply on the toolbar to execute the operation.



● Click Advanced to specify the detail information of the new partition, such as partition label, file system(NTFS or FAT32), partition type. You can set up as your need.

● We strongly recommend that choose NTFS system. And if your hard drive is a SSD, check the SSD partition alignment to optimize the SSD.

● And it is more safe for your data on hard drive to backup before all operation above.