
Once again, in this situation, we recommend using the excellent MiniTool Partition Wizard free edition to extend your partition without any issues. In the picture below, the unallocated space is to the right of the partition “C”, and Windows allows me to extend the “C” drive without any issues. The same option is grayed out when I right-click on the “D” drive because the unallocated space is not immediately after the “D” drive. Because of this, when I right-click on “C” drive/partition, Windows displays the Extend volume option. So, in this case, the unallocated space is after the “C” drive and there is no unallocated space immediately after the “D” drive. Let’s say that the unallocated space is after the “C” drive and before the “D” drive. The unallocated space must immediately follow the volume or partition that you want to extend. Reason 3 of 4 The unallocated space is not to the right of the partition that you want to extendĪt times, even if you have GBs of unallocated space on the drive, Windows 10 won’t display the Extend volume option as the unallocated space is not after the partition that you want to extend. If you have free space on one partition, you need to shrink the partition first to create some unallocated space and then use the Extend volume feature. Just because there is GBs of free space on one of your partitions, you can’t extend a volume using free space available on another partition. Many of you might aware of this but most users are not aware of the fact that there must be unallocated or unpartitioned space on the drive in order to use the Extend volume feature. Reason 2 of 4 There is no unallocated space on the drive

If you want to extend a FAT or FAT32 partition, either use MiniTool Partition Wizard free software or convert FAT/FAT32 to NTFS first.

In the picture, the drive is formatted with NTFS.

Step 2: Under the General tab, you can see the current file system next to the File System. Right-click on the drive that you want to check, and then click Properties.

Here is how to check if a partition is formatted with FAT, FAT32 or NTFS: If you want to extend FAT or FAT32 partition, you need to use third-party tools like MiniTool Partition Wizard free edition. In other words, Windows doesn’t support extending FAT and FAT32 file systems out of the box. Yes, the Extend volume feature applies only to the NTFS partitions. Reason 1 of 4 You are trying to extend FAT or FAT32 partition
