How to create a new d drive in windows 10 on my laptop

Here's how to create a new drive using the diskpart command-line tool in Windows 10. This method works by shrinking your existing C: drive to create unallocated space, then creating and formatting a new partition as D drive.

Important: Backup important files before using DiskPart. Mistakes can cause data loss.

First, open diskpart utility and list all disks in Windows 11/10.

diskpart list volume

Identify the volume number of the C: drive (look at the label and drive letter).

Next, select C: drive.

select volume X

Shrink the C drive and shrink the partition to D drive:

shrink desired=102400

This shrinks the volume by 102400 MB (100 GB). You can change the number to your desired size.

Finally, create a new d drive in windows 11/10 , format it as NTFS and assign the D drive letter to new partition.

create partition primary 
format fs=ntfs quick 
assign letter=D

Tip: If the shrink command fails, it's often due to unmovable system files. Consider using third-party partition tools in that case.