Partition Hard Drive Windows 10 Disk Management

"After installing Windows 10, we need to partition hard drive in Disk Management to distribute more free space for Windows 10 future use. How to partition hard drive in disk management? Can we partition it without data loss? I heard that you had to format hard drive to create new volume, can we do partition it without data loss? "

If you have unallocated space on your hard drive, it's ok to create partition with it without data loss, but if you have no such space available, you have to split exist partition into partitions, in Windows 10 Disk Management, Delete Volume is the function you shall use, which will not keep data when operating. We'll guide you how to partition hard drive without data loss in this page.

Steps to partition hard drive in Windows 10 Disk Management

  • 1. Press Windows bottom and type disk management in search box to open Disk Management.
  • 2. Right-click on unallocated space and select New Simple Volume; follow New Simple Volume Wizard.
  • 3. Confirm Simple Volume size, assign drive letter, format volume with file system, allocate unit size (cluster size), Volume label, and perform a quick format, Finish.
  • When a new windows popup, it means you succeed, this window is file explorer of the volume you created.


If you don't have unallocated space, follow the steps below:

  • 1. Right- click one big size partition, select Shrink Volume
  • 2. Enter the amount of size to shrink in MB: ***MB; and click Shrink
  • Now you have unallocated space in primary partition now, or free space in extended partition.

Partition hard drive command prompt

Another way to partition hard drive in Windows 10 is to use command prompt: diskpart. Here are the steps to create volume using command prompt, along with shrink partition and extend volume in Windows 10 CMD

Steps to create partition in Windows 10 using command prompt

  • 1. Press Win+R to Open Run Box, type cmd
  • 2. type diskpart and click Yes when UAC window Shows, type the following in order
    • list disk
    • sel disk 1
    • list partition
    • sel partition 1
    • ass
    • exit
  • 3. Do as follow to shrink partition in diskpart if you don't have free space or unallocated space on your hard drive.
    • list disk
    • sel disk 1
    • list partition
    • sel partition 1
    • shrink
    • or shrink desired=20480
    • exit
  • Type shrink directly will automatically shrink partition by Windows, you can also type shrink desired=*** to define your own partition size.

Partition hard drive in Disk management or command prompt : diskpart can keep data intact on the operation of create and shrink volume, but not extend volume when the free space or unallocated space is not next to the partition you want to extend, for example, you want to extend C Drive, the system partition, but free space is right behind E partition, then Extend Volume gray out in right-click menu or C Drive, there's no way to make this function active but to delete D partition, the partition next to C Drive, and make D partition as continues unallocated space to C Drive. So we shall try another system utility to partition hard drive without data loss.

Partition hard drive Partition Expert

Partition Hard Drive in Partition Expert is easier than in Disk Management or Command Prompt diskpart. You can partition hard drive without losing data no matter you are creating, shrinking or extending Partitions.

Check the following link to :

  1. Extend partition without data loss
  2. How to shrink Partition in Windows 10
  3. How to Create Volume in Windows 10
  4. How to merge partition with unallocated space