The main reason shall be that the target disk you wil convert contains partitions and Disk Management can only convert an empty disk to GPT or MBR. However, the “Convert to GPT Disk” or “Convert to MBR Disk” option may be unclickable. “Convert to GPT Disk” or “Convert to MBR Disk” greyed outįor some reasons, you might need to convert the partition style from GPT to MBR, or MBR to GPT. Thus, you will need to convert FAT32 to NTFS. The Disk Management can only shrink or extend the NTFS or RAW partition.

But this way is not recommended since you will lose all the data on the partition. If the target partition is followed by adjacent unallocated space, but the “Extend Volume” still greyed out, it might because the partition is FAT32. In this case, you have to delete an adjacent partition to have adjacent unallocated space, and extend a volume with it. Otherwise, this option would be grayed out and unclickable. That’s mainly because the “Extend Volume” can only work when the available unallocated space is adjacent to the right side of the volume you want to extend.

Many users have met the issue that the “Extend Volume” grayed out when they try to extend a volume with unallocated space on the disk. The following are some common situations where you cannot finish your disk partition managements via Disk Management. Disk Management has its restrictionsĪlthough the inbuilt Windows 10 partition tool (Disk Management) comes with many features to help manage disk partitions in Windows PC, they have some significant restrictions, and it is not suitable for every circumstance. It is free and allows users to view disk information and perform several disk management operations, including initializing a disk, creating volume, formating volume, shrinking a volume, extending a volume, converting MBR to GPT/GPT to MBR, changing drive letter, and so on.

It is a system tool in Windows 10, 8, 7, XP. When it comes to managing disk partitions in Windows 10, most users will turn to the Windows 10 built-in Disk Management tool. Partition Windows 10 free tool: Disk Management

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