Right-click on the area that says unallocated space, then select New Simple Volume and hit Next after the wizard opens. Leave the volume size alone, it will default to the maximum available space, click Next. Choose a drive letter from the list, or just leave it on the default letter, click Next. On this screen make sure the File system is set to NTFS and leave the allocation size on its default setting, If you like, you can give the drive a name, or you can just leave it blank. Check the box next to Perform a quick format and click Next. Click Finish then Format Disk.
