Solution 1: Create Unallocated Spaceįirst things first, make sure that you have unallocated space on your system drive to be able to extend a specific volume. Note:īefore you get into the solutions, please make sure that you have made a backup of all the files on your partitions as one or two solutions might require you to delete a partition.

Getting onto the solutions of the issue, you can isolate your problem by going through the workarounds down below. System volume: If the volume that you are trying to extend is the system volume (where Windows is installed), you will not be able to extend it using the Disk Management tool.If there’s no unallocated space on your hard drive, you won’t be able to extend the volume naturally. No unallocated space: The primary requisite when extending a volume is unallocated space.Therefore, if the volume that you are trying to extend is in FAT32 format, the option will be greyed out. Partition format type: It is important to note that only NTFS file systems can be extended using the Disk Management utility.

Extend partition windows 10 greyed out