Right click on (E:) drive and click move/change. Then, drag the partition to extremely right without changing its space,(So that unallocated space moves to left) and click OK. Do same as above to (D:) drive moving it to right, so that all unallocated space is together and to left of (D:) drive, i.e. to the right of (C:) drive. Unallocated space on your hard drive is taking up valuable space but until it is allocated, Windows can't use it. Note that when you buy a hard drive, you cannot use the full amount Set the ISO as the boot device of the VM. boot it and use to move the EFI partition to the end of the disk. This will implicitly relocate the Unallocated space to below C:. Remove now the boot ISO and reboot normally. Disk Management will now be able to extend C:. Take a backup of the VM before doing the above, just in case. Unallocated space is part of disk space that is not allocated to any partitionA computer describes any physical space on a hard drive that doesn't belong to Once done, restart your computer and check if the issue is resolved. 2. Delete a Partition and Create Unallocated Space. The "extend volume" option will gray out if there is no unallocated space next to the partition you want to extend. To create unallocated space, you will have to delete a partition that is next to the partition you want to In this case, Windows cannot extend the volume to the unallocated space. It means the "Extend Volume" function only works when the unallocated space is in the adjacent right side of the to-be-extended volume. On the main window, right-click on the unallocated space on your hard drive or external storage device and select "Create". Step 2. Adjust the partition size, file system (Choose the file system based on your need), label, etc. for the new partition and click "OK" to continue. Step 3. Note: Windows Server 2008, Windows Server 2008 R2, Windows Vista, Windows 7, Windows 8 and Windows Server 2012, Windows 8.1, Windows 10, Windows Server 2012 R2, Windows Server 2016 and Windows Server 2019 can expand the volumes from the Disk Management in Computer Management.Right-click on Volume and click Extend Volume.For more information, see Microsoft's documentation. To shrink a volume on Windows, start by pressing Win + R to open Windows Run. Then, enter compmgmt.msc in the Run text box and press Enter to open Computer Management. In the Storage section of the left panel, select Disk Management. In the right panel, right-click the volume you want to shrink and select Shrink Volume. Step 1: Install and run it. Right-click the partition you want to add the unallocated space to and then choose Advanced > Merge Partitions (e.g. C partition). Step 2: Select the unallocated space and then click OK. JUunp.