If you right click this Unallocated space in Disk Management, all options are unavailable. If you shrink it instead, Extend Volume is also grayed out.Īs the screen shot shows, drive H is formatted as NTFS and Primary, and there is also contiguous Unallocated space on the right, but Extend Volume is still grayed out. In many computers, the contiguous drive D: is used for programs, so you cannot delete it. If you did not delete or shrink other data volume to get Unallocated space, of course you can't extend system partition C. The difference is: all disk space of a drive will be converted to Unallocated after deleting, but only part of unused space will be converted to Unallocated by shrinking To get Unallocated space, you may either delete or shrink a drive. As the name, this kind of disk space is not allocated to any drive. The size of physical hard disk is fixed and a 500GB disk can't be increased to 1TB, therefore, before extending a partition drive, there must be Unallocated space. To do this, press Windows and R together on the keyboard, type diskmgmt.msc and press Enter.
To better understand the reasons and solutions, it is suggested to open Disk Management and find out your own disk partition type and structure. To data volume there are 2 additional reasons. To system partition C, there are two common reasons. Why can't extend partition C in Windows 7 The typical example is that they cannot extend C drive after shrinking D, because Extend Volume is disabled. However, many people feedback that they cannot extend volume in Windows 7 Disk Management. Better than previous Windows XP, Windows 7 native Disk Management utility has Shrink and Extend Volume feature to resize partition without losing data. Low disk space issue is very common in all Windows versions.
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