You want to extend D drive, but the option is grayed out. Say you have a System Drive – C and a data drive – D. If it is your Data Drive that you want to extend, then there is a workaround. If you need to extend the volume, you will need to delete the partition on the right side, i.e., behind the partition you want to extend and create unallocated space. How do I fix Extend volume option grayed out?
Lastly, Windows can’t extend is a FAT or other format partition. Also, if there is no contiguous unallocated space or free space behind the partition that you want to extend. This could occur if there is no unallocated space on your hard drive. These could be the possible reasons for Extend volume option grayed out.
Why is the Extend volume option grayed out? If there is no unallocated space, you will not be offered this option and it will appear grayed out. The Windows operating system lets you extend any volume provided there is free or unallocated space on its right side. But what if the Extend Volume option is grayed out or the Extend command fails? We can use the built-in Disk Management Tool or the Diskpart or Fsutil command-line tools to create, resize, extend, and delete partitions. If you find that the Extend Volume option is grayed out or disabled in Disk Management Tool in Windows 11/10/8/7, then this post will explain why this happens & what you can do about it.
