How do you extend partition with unallocated space in Windows 10

When the built-in tools like Disk Management or DiskPart can’t extend a partition especially when unallocated space is not adjacent, third-party disk manager tools like Dr.Partition provide a more flexible and user-friendly way to extend partition in Windows 10 PC.

Step 1: Open the program. It will display a visual map of all your disks and partitions.

Step 2: Click on the partition you want to enlarge (e.g., the C: drive).

Step 3: From the left-hand menu or right-click context menu, choose “Resize/Move Partition”.

Step 4: If there is unallocated space next to the selected partition, drag the partition border to occupy that space.

Step 5: After adjusting the partition size, click “OK” to confirm. This will add more space to the partition.

Step 6: Click “Apply” (usually in the upper-left corner) to execute the pending operations.

Dr.Partition is a powerful and user-friendly disk management tool for Windows 11 and Windows 10. Unlike the built-in Disk Management or DiskPart, Dr.Partition allows you to extend a partition even when unallocated space is not adjacent, thanks to its smart partition-moving feature. Whether you're running out of space on your system drive or need to enlarge a data partition, Dr.Partition makes the process simple and safe.