System partition or Drive C is the standard location where Windows stores its files, apps, program data, drivers, and other mission-critical files. The amount of storage Windows consumes is not static — it frequently goes up and down depending on the system’s needs, current workflow, installed apps, and many other aspects. For that reason, when installing Windows 10 or 11, give the system partition slightly more space. A good pick is 100GB and more.
Sometimes users need to extend the system partition to make room for more apps, Windows updates, swap files, hibernation, etc. You can fix the problem by reinstalling Windows and remapping partitions, but that method is a bit too radical. This article will show how to extend system partition in Windows 10 and 11 without uninstalling the operating system.
Extend System Partition on Windows 10 and 11
Before we start, it is important to note that you cannot extend the system partition using another drive. If your system SSD has only 120GB, you cannot grab an extra 20GB from another physical drive. If your system partition is mapped on a larger physical drive (SSD or HDD), then you can remap it and add more space or shrink it.
Improtant. You cannot extend the system partition on Windows 10 or 11 without Administrator privileges.
It is worth noting that your system partition should be mapped with GUID (GPT) and have its type set to Basic. Also, you do not need third-party apps to extend the system partition on Windows 10 and 11. Although there are some great apps for managing partitions and disks, modern Windows version can reallocate disk space without extra software.
- Move files from the partition you will use to extend the system partition in Windows 10 or 11. Back them up to a cloud drive or an external drive.
- Press Win + R and type diskmgmt.msc, then press Enter. Alternatively, right-click the Start menu button and click Disk Management. You can also use other methods, such as Windows Search or the classic Control Panel.
- Delete a partition you want to reallocated for the system partition. Right-click it and select Delete Volume.
- Alternatively, right-click the partition and select Shrink Volume.
- Specify how much space you want to shrink to extend the system partition. Type the amount in megabytes in the Enter the amount of space to shrink in MB field. Note that the value should not exceed the one specified in the Size of available shrink space in MB box.
- Click Shrink.
- You will now see a black Unallocated portion on your drive.
- Right-click the system partition and select Extend Volume.
- Follow the on-screen instructions in a new window. The operating system will prompt you to enter the amount of space to add to the system partition. Specify in the Select the amount of space in MB, then click Next. You can use all space available or set a smaller volume depending on your needs.
- Click Finish. Windows will extend the system partition without extra confirmations or procedures.
That is how you extend the system partition in Windows 10 and 11.