Open Server Manager, click File and Storage Services and then click Storage Pools. Right-click on a virtual disk and select New Volume. Click Next
Select Server and Disk, then click Next
Enter the Volume size and then click Next
Choose where you want to assign the new volume and Next
Change any file system setting, File System or Volume Label and then click Next
If everything is correct then click Create.
If you want to see the new volume click Disks and then select the disk. Then below you can see your new volume.