Create New, Resize, Extend Partition using Disk Management Tool in Windows 10/8/7

For any partition management work there are many free third-party tools available, but Windows includes a pretty good Disk Management Tool which should suffice you for most of your disk management work like partitioning, formatting, merging, etc. Similar to Windows 7, the Windows 10/8 built-in Disk Management Tool also allows you to re-size the disk, create a partition, etc., if you have enough free space on your system drive.

Disk Management Tool in Windows

Before you start, I recommended you back up your data to a safe place. Next, you need to access Computer Management tool first. So, press Win+X simultaneously to bring up the Power Tasks Menu and from the options displayed choose Computer Management’.

This will display Computer Management. Computer Management section is a collection of Windows administrative tools that you can use to perform your computer-management tasks. The option also appears in the Administrative Tools folder in the Control Panel.

In Computer Management, you will find Storage option. Under it, you will notice ‘Disk Management.’ Click on it. Alternatively, you may simply type “partition’ in Settings search and hit Enter to open the Disk Management Tool. Once you have clicked it open all the disks with their volume will be displayed in the small window.

Select a disk for creating a new one. Right-click on it. You will see various options like:

  • Change Drive Letter and Paths
  • Format
  • Extend Volume
  • Shrink Volume
  • Add Mirror
  • Delete Volume

Read: How to delete a Partition.

Create New Partition or Volume

Let us as an example say that you want to create a new volume or partition. So to do this, first select ‘Shrink Volume’.

Then, wait for some time while Windows check the amount of space available for Shrink. Enter the amount of space to shrink in MB and hit ‘Shrink’. Once you hit the button, you will observe some free space created. Check out the screenshot below.

Now, right-click on the free-space created and choose the first option ‘New Simple Volume’.

Then, select the amount of space you would like to allocate to the free space and click ‘Next’.

Now, assign a drive letter to your partition and move to the next step by clicking ‘Next’.

If you would like to store data on this partition, you will have to partition it first. So, format the partition with NTFS.

After the formatting process as been completed successfully, you can see a new partition created in your Windows Explorer.

Using this inbuilt Disk Management Tool in Windows 10/8/7, you can similarly create a partition, extend a partition, shrink a partition and do more very easily. See this post if your Extend Volume option is grayed out.

How to resize a partition in Windows using DiskPart may also interest you.

Posted by on , in Category General with Tags
Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. seems quite the same as windows 7

  2. vinayaka

    i am getting error when i create new volume from free space please help me

  3. chiriqui

    You must be working in a parallel dimension because none of is available. Oh I can get to Computer Management (windows 8) not as you suggest Setting/search typing in “partition” Secondly all or most of those feature I need to use are grayed out. I’m guessing for some bloody reason I’m not seen as an administrator, but it’s only a guess

  4. Vivek

    When i create new simple volume from free space (97 GB), it get error that “there is not enough space available on the disk(s) to complete this operation.Please help me to save my Disk of 97 GB.

  5. There could be two possible solutions for this issue: As the disk pre-configured by OEM may have conflicts with disk management tool in Windows, you should try some 3rd party tool to repartition the disk. You may try to delete a less important partition created already and merge the space together to create a new partition with proper drive letter. See

  6. alex

    Mini partition tool Wizard Home Edition. 100% working and updated. Follow the link below to
    download absolutely free.

  7. Vinayaka

    Why the Extend Volume option is hidden????

  8. If it is not possible for Windows to extend the Volume, it will be grayed out.

  9. Siju

    only if the free space is near to the drive you wish to extend, the option can be selected. If ithere are any drives in between, it will be hidden.

  10. Sarah Clinton

    on one hand,disk management is a perfect tool, but on the other hand, its has some limitations, for example, the extend volume is only available when there is unallocated space adjacent to the partition, otherwise the extend volume will gray out. furthermore, you can not move partition with disk management. how can do to extend system partition? i have been troubled by then same problem. but i surfed on internet and fond a free third-party software to solve the problem. aomei partition assistant.
    more detail information:
    hope can help the guys who needed it.

  11. AYUSH

    how to marge to dynamic disk ?

  12. Rohit

    i wan to create first extended then 2 logical partition in it after that primary partition

  13. miatratto this is my site and this is consists of many amazing tricks :p

  14. Nic M

    I have a windows 7 laptop. I didn’t know there was a WIN key, what does one look like? Thank you

  15. anonymous

    i have a 2TB external hard disk which is not getting detected by my computer.So, what should i do now to get it detected?

  16. soriful islam

    Windows was unable to comlete the format Removable Disk K:

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