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Why Extend Volume Grayed out and How to Quickly Fix It

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    When Windows gives Low Disk Space warning or there is no enough space to save new files, most people would consider extending the very partition. Luckily, since Windows Vista, Microsoft adds the feature Extend Volume to system built-in Disk Management utility, which could help users enlarge a partition.

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    But disappointingly, lots of people complaint that the Extend Volume feature of their Windows is grayed out, like this:

    Extend volume grayed out 1

    Do you know the exact reason for this issue? Have you found an alternative solution? If not, keep reading this post to get useful information.

    Extend Volume Feature Will Be Grayed out under The Following 5 Situations

    For Basic Disks:
    1. The partition you want to enlarge is NOT a NTFS partition. Microsoft rules that Extend Volume feature in Disk Management only works to a RAW or NTFS partition.
    2. There is no continuous unallocated space behind the primary partition you want to extend, or no continuous free space behind the logical drive you want to expand. For more information, please see Primary Partition vs. Logical Drive.

    For Dynamic Disks:
    3. There is no unallocated space on dynamic disks.
    4. There is no continuous unallocated space behind C drive.
    5. No continuous unallocated space is located behind mirrored volume, striped volume, spanned volume, and RAID volume, or continuous unallocated space is located behind only one segment of these types of volumes.

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    Is the Extend Volume feature of your computer grayed out? If yes, see the following part to get solutions.

    Extend Partition with MiniTool Partition Wizard

    MiniTool Partition Wizard Free can help users extend both FAT32 partition and NTFS partition whether there is unallocated space on the hard disk or not. However, if it is the system partition, system reserved partition or EFI system partition to be extended, it is recommended to make a backup of your running OS or use MiniTool Partition Wizard Bootable (included in the Pro Edition) to do this job in case of any accidents.

    Next, let's take extending FAT32 partition in Windows 7 by using the free edition for example.

    Firstly, launch the partitioning tool to open its main interface:

    minitool partition wizard main interface select partition to extend

    Then, select the partition which needs extending (here, we extend partition G which is a FAT32 partition, and there is no unallocated space contiguous the partition), and then click the function "Extend Partition" from action panel.

    extend partition choose a partition or unallcoated space to take free space

    Next, expand partition G by taking free space from an existing partition or from an unallocated space and drag sliding button to decide how much space to take.

    extend partition apply change

    At last, apply all changes if they are satisfying.

    After application, the selected FAT32 partition will be extended. Now, download the partitioning tool MiniTool Partition Wizard to solve the problem Extend Volume Gray out.