> How to > Partition Master > Two Ways to Make Use of Unallocated Space in Windows 10

Two Ways to Make Use of Unallocated Space in Windows 10

Posted on Jan 22, 2018 by Daisy to Partition Master

Summary:
This page introduces two ways to make full use of unallocated space in Windows 10 by either format unallocated space Windows 10 so as to create a new partition in Windows 10 or add unallocated space in Windows 10 to a partition.

There is a 99GB unallocated partition on Windows 10 computer

I have two hard disks installed on the Windows 10 desktop, so I would barely worry about the low disk space trouble. But there is a 99GB unallocated partition next to C drive, without any possibility to use it. What's your suggestion to make it usable?

It's common to see unallocated space in Windows 10 computer, as our customers wrote to us. They feel puzzled about the blank space with no drive letter assigned to it. What is unallocated space on a hard drive? When setting up new Windows 10 computers, the system installation will ask you to partition unallocated space, which explains that without allocation, you can't use the space on the drive. In some cases, existing computers will also have unallocated space. 

A computer describes any physical space on a hard drive that doesn't belong to a partition as unallocated. This means that no programs can write to the space. For all practical purposes, the space doesn't exist to the operating system. To make use of unallocated space, you need to either create a new partition using the space or expand an existing partition.

Download Now

 Windows 10 is supported

Two Ways to Manage Unallocated Space in Windows 10

No matter which way you decide to make a full use of the unallocated partition in Windows 10, the job can be easily taken by EaseUS free partition manager. It's the best Windows 10 partition manager that helps customize hard drive volumes as you wish.

Create/make a partition Windows 10 on unallocated space

Step 1. Right-click the unallocated space, and choose "Create Partition".

create partition on unallocated space in Windows 10

Step 2. When the Create partition window pops out, you can enter a partition label, select a drive letter, cluster size, partition size, partition type (Primary/Logical) and file system from the pull-down menu. While creating a partition, you also could resize the new partition to a certain size.

edit information of a new partition created on unallocated space in Windows 10

Step 3. Click "OK", a new partition will be created.

Add unallocated space Windows 10 to an existing partition

This is an ideal way to fully utilize the free space in the unallocated partition, meanwhile, solve the low disk space trouble on the other partition. To add the unallocated space to an existing partition, you can either choose to merge partitions or resize the partition.

Option 1. Merge two adjacent partitions (move the unallocated space next to the partition you decide to extend, for example, c drive)

Step 1. Right-click c drive, and choose "Merge partitions".

merge unallocated space in Windows 10 to an existing partition

Step 2. In this Merge partition window, you should first choose two neighbor partitions: here should be the unallocated partition in the partition layout.

Step 3. Choose the merge destination: partition c by selecting a partition label in the drop-down list of "Merge selected partitions to".

Step 4. Click OK, the program will check file system on the partitions.

Step 5. Click Apply, you have successfully merged the unallocated space into partition c.

Option 2. Resize partition (move the unallocated space on either side of the partition you decide to extend, for example, c drive)

Step 1. Right-click c drive and select "Resize/Move partition".

Step 2. Position the mouse pointer on the right partition handle. Drag the handle to rightwards to extend C drive and click Ok. Click Apply.

add unallocated space in Windows 10 to other partition