Method 1
This should always be your first choice. It's a reliable tool that comes with Windows and is designed for basic disk operations.
Right-click Start Button
This will open a menu with various system options.
Select Disk Management
Click Disk Management to open the tool for managing partitions.
Locate the Disk
In the Disk Management window, find the hard disk you want to partition
Right-click on the Partition to Shrink
Right-click on the partition to shrink (usually C: drive).
Select Shrink Volume
Choose Shrink Volume from the menu.
Amount of Space to Shrink
Enter the amount of space you want to shrink (in MB).
Click Shrink
Click Shrink to create unallocated space.
Create a New Partition
Right-click on the unallocated space created.
Select New Simple Volume
Choose New Simple Volume to start the partition setup
Follow the Wizard
Follow the on-screen instructions
Assign a drive letter.
Format the partition (typically NTFS).
Label the partition.
Finish the Process
The new partition will now be available in File Explorer
Caution: If available shrink space is much less than free space, unmovable system files cause it.