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The system partition C is NTFS with no doubt, so the only option to extend system partition with Windows 10 Disk Management is by deleting the adjacent drive D. Note: as I show you above, if drive D is not formatted as NTFS, you cannot extend this partition.
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In this situation, you need third party disk partitioning software. Limitation 2 – only NTFS partition can be extendedīoth Shrink and Extend Volume functionalities only support NTFS partition, so FAT32 and other types of partitions cannot be extended, even if there is adjacent Unallocated space on the right side. So you cannot extend C drive by shrinking D. For example: when you shrinking D, Unallocated space is generated on the right side of D, but to extend C drive with Extend Volume, Unallocated space must be on the left side of D. Extend Volume can only extend a partition with adjacent Unallocated space on the right side. Shrink Volume can only produce Unallocated space on the right side. Limitation 1 – cannot extend partition by shrinking another one However, there are still 2 serious limitations that cause unable to extend partition in Windows 10. Why I said “supported” partition? Because not all hard drives can be extended.īetter than all previous Windows, Windows 10 formats the hard disk as GPT style by default when installing, so there is no restriction between Logical and Primary partition in MBR disk. It is safe and able to extend the supported partition on the fly. Windows 10 Disk Management utility has built-in Extend Volume functionality to extend disk drive.