Extended volume grayed out

I am having the same problem.  The posted fix above indicates the option to extend "is only available when there is contiguous unallocated space behind the volume which you want to extend."  I show 746.52GB of unallocated space immediately following the primary partition... but the option to extend is still grey.  Please advise.

I have data on my primary partition now so was hoping to extend without any reformatting.  Thanks.

I'm now running Windows 10 if that matters.

there are basically 3 situations that "Extend Volume" will not work:

1.The partition users want to extend is not a NTFS partition. Microsoft says extending volume feature in Disk Management only works to a raw or NTFS partition.

2.There is no unallocated or free space on hard disk or the space is not contiguous and after the partition which needs extending.

3.Users want to extend a primary partition/logical partition, but there is just a free space/unallocated space right after the target partition.

So you are in the situation 3. in this case, you need to move the free space out of extended partition. In Disk Management, you can delete all the logical partitions and then the free space will become unallocated space, which can be used to extend primary partition. To solve this without data loss: you shall find the steps here: move unallocated out of extended partition

Hi,

Thank you for posting the query in Microsoft community forums!

In fact, "Extend Volume" option only available when there is contiguous unallocated space behind the volume which you want to extend. As here is no unallocated space after the C partition drive, so extend volume greyed out.

You need to have an “unallocated disk space” to the right of the Partition\Volume you wish to extend on the same drive. Only when “unallocated disk space” is available “extend” option is highlighted or available.

Refer to the links:

Extend a Basic Volume

http://technet.microsoft.com/en-us/library/cc771473.aspx

http://technet.microsoft.com/en-us/library/cc770938(WS.10).aspx

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