Post actualizado el día octubre 24, 2026 by DeiviSanzPlay
Windows 10 includes enough tools to create, shrink, and extend partitions, but not all of them work in every situation. If you’re going to reorganize your computer’s storage, it’s worth knowing which option fits each case before touching anything.
The three most commonly used methods and what each one is for
Disk Management (built-in)
Open it by right-clicking Start → Disk Management. It lets you create volumes, format, shrink, and extend, but with a limitation that surprises many: to extend a partition, the unallocated space must be immediately to its right. If you have a recovery partition in between, the command appears grayed out. It also only shrinks as far as the system believes it can move the files, and with heavily fragmented disks it may refuse to shrink by more than a few MB.
Diskpart (command line)
It uses the same logic as Disk Management but through the console. Useful when the graphical interface fails or for automation. The risk is real: a mistyped clean wipes the entire partition table. There’s no friendly confirmation.
Third-party software (EaseUS Partition Master, MiniTool, AOMEI)
Their big advantage is moving partitions: they let you drag a volume to free up contiguous space and then extend the target partition. They also convert MBR to GPT and recover partitions. The trade-off is that free versions usually limit features (basic resizing yes, but not always moving system partitions) and require a reboot to operate on the disk where Windows is installed.
Practical comparison by scenario
- Creating a new partition in free space: Disk Management is enough and is the safest option.
- Shrinking C: to install Linux or separate data: the native tool works if there’s contiguous space; if the volume is fragmented, third-party software gives you more room to work with.
- Extending C: with space to the left or with partitions in between: here the native tool won’t work; you need to move partitions with external software.
- Converting MBR to GPT without losing data: only with third-party tools (or with Microsoft’s MBR2GPT utility, which has specific requirements and doesn’t work on all machines).
A detail you only learn by using this
On laptops with NVMe SSDs and preinstalled Windows 10, it’s common to find up to four recovery and system partitions at the beginning of the disk. When someone tries to extend C: with the space freed from D:, they find that space ends up to the right of D: and not of C:. The solution isn’t to shrink more, but to move D: to the right with partition software. It’s the most repeated mistake and doesn’t appear in most basic tutorials.
Another case: BitLocker. If the disk is encrypted, some resizing operations fail or ask for the recovery key on reboot. It’s advisable to suspend BitLocker before moving system partitions, not just disable it.
What these tools don’t solve
No option eliminates the risk of data loss if there’s a power outage mid-operation. Nor do they turn an HDD into an SSD or fix a disk with bad sectors: if the disk has SMART errors, partitioning is a bad idea. And if the SSD’s firmware sits behind a proprietary RAID controller, many third-party utilities won’t recognize the disk.
According to official Microsoft documentation, the native tool doesn’t allow operating on the system partition while it’s in use, hence the reboots that external suites require. And as a general industry rule: make a backup first, even if the operation seems trivial.
Quick recommendation
To create or split free space, use what already comes with Windows. To reorganize existing partitions or extend C: when there are obstacles in the way, use specialized software with a trial version and verify in the preview before applying. And if the machine is a company computer with encryption, coordinate with whoever manages BitLocker: it’s not a procedure you should do on your own.
