How to create the extended partition

 All disk management functions can be performed using Disk Management MMC snap-in. Disk Management MMC snap-in is available as an extension to the Computer Management MMC snap-in. To open the Computer Management MMC snap-in, right click My Computer and select "Manage" from the context menu. Expand Storage node and select "Disk Management". If you want to open Disk Management MMC snap-in as standalone, type diskmgmt.msc inside the run dialog box and hit "Enter".

1) Right click the available space on the disk on which you want to create the extended partition, and select "New Partition" from the context menu.

2) Click "Next" in the "New Partition Wizard".

3) Select "Extended Partition" in the "Select Partition Type" and click "Next" to continue.

4) Enter the partition size in the "Specify Partition Size" Screen. We have selected 30GB remaining storage space. Click "Next" to continue.

5) Click "Finish" in the "Completing the New Partition Wizard" to create the extended partition.

8) New Extended Partition is created and listed inside Disk Management MMC console.