3. Select disk: The “Select Disks” screen will already have the appropriate disk selected. It also shows the total volume size and the maximum available space you have to extend the volume. Just select the space you want to use and then click the “Next” button. Here, we’re extending our volume to use all of the available unallocated space.
4. Final step: And finally, click the “Finish” button to have Windows extend the volume.