If your windows installation is not showing the right amount of disk size, please follow the instruction below :
- Log in to your Windows instance using Remote Desktop
- Run - diskmgmt.msc and press Enter. The Disk Management utility opens.
- Next to Disk1 - Right-click on the partition.
- New Simple Volume
- Follow on screen insturction.
- Set and add more size to your target partition and click "Next" to continue. Generally, you specify the maximum available space
- Assign Drive letter.
- On the next page, Format the volume. It is recommended to use NTFS.
- You can name the volume to any thing or keep default.
- Click "Finish" to complete the process.