You can create a new partition in Windows 11 with Disk Management when a drive has unallocated space. If all space is already assigned to an existing volume, you may need to shrink that volume first.
Before You Change Partitions
Back up important files before resizing or changing disk partitions. Shrinking a supported volume and creating a new volume are designed to work without deleting the existing volume’s files, but disk changes still carry risk. Back up important data first, and remember that formatting an existing volume destroys the data on that volume.
1. Open Disk Management
- Right-click the Start button.
- Select Disk Management.
- Identify the correct physical disk and volume before making changes.
2. Create Unallocated Space if Necessary
- If the disk already has unallocated space, skip to the next section.
- Otherwise, right-click a volume that has enough free space.
- Select Shrink Volume.
- Enter the amount to shrink and confirm the operation.
3. Create the New Volume
- Right-click the Unallocated space.
- Select New Simple Volume.
- Choose the volume size.
- Assign a drive letter if desired.
- Select the file-system and formatting options appropriate for the intended use.
- Review the choices and finish the wizard.
Partition vs. Volume
Windows Disk Management often presents the task as creating a new simple volume. In everyday Windows use, people commonly describe this as creating a partition, although disk layout and volume terminology are not always identical.
Do Not Modify Recovery or System Partitions Casually
Small EFI, recovery, and other system partitions can be required for startup and recovery. Do not delete or resize them simply to gain space unless you have a specific, verified reason and a recovery plan.
Summary
Use Disk Management to create a new simple volume in unallocated space. If necessary, shrink an existing data or Windows volume first, but back up important files and avoid altering system or recovery partitions without a clear reason.