[100% Fixed] Can I Extend C Drive from Another Disk in Windows 10/11?

Extending a C drive from another disk is a straightforward process, despite the limited availability of software or methods that can do this directly. Fortunately, the plans outlined in this article can instantly expand the C drive, even when two volumes are not located on the same HDD or SSD.

Do you have the same question about extending the OS drive? See the new quiz from superuser.com.

You want to add a second hard drive to your existing one to expand the storage space, without reinstalling Windows 8. This is possible, and it's called a "disk extension" or "disk expansion". You can use a software like Disk Management (built-in to Windows 8) to merge the two 30GB hard drives into one large 60GB drive, effectively expanding your C: drive. This way, you can keep all your files and programs intact, and make use of the extra storage space. Would you like me to guide you through the process?

When your C drive runs out of space, cache files from apps and installed programs can slow down your device, leading to issues like high disk usage and Windows OS updates getting stuck.

If you're experiencing an issue where the system is running out of disk space, the best solution is to increase the C drive space on the first disk. A powerful and safe disk partitioning software can help you achieve this.

Use Professional Software to Extend C Drive from Another Disk

Are you getting a "Low Disk Space" message on your C drive? You're not alone! I've encountered this issue before, especially when downloading a new game or upgrading Windows. To resolve this, I recommend using Qiling Partition Master, which now allows you to extend space from another disk, freeing up space on your system drive.

If your system disk is running low on space and you have a second disk available, this software can help. It can create a new partition on the second disk without deleting any data, allowing you to expand the original space of drive C by automatically migrating programs and data from the system partition.

More info about Qiling Partition Master: 

How to Extend C Drive from Another Disk with Qiling Partition Master

Here you can get an in-depth guide and some notes. Remember that do not select external devices during execution and do not abort partition creation. 

Some tips about using this feature:

1. Will this function transfer all files from the C drive? 

The Windows components and personal desktop data are not migrated.

2. Can I select the third disk?

If multiple disks exist, you can select the second or third disk to relocate the disk.  

3. What about capacity or speed limit? 

There is no limit to the amount of data that can be migrated, and the migration speed is determined by the size of the data, being the same as the Windows Copy speed.

4. Can I check the new partition with the Windows built-in tool?

To edit the newly created migrated partition using Disk Management, follow these steps:

Free download Qiling Partition Master:

• Free Download
• Windows 11/10/8/7, 100% Secure

A step-by-step guide to using the feature:

Step 1. Select partition D, click Resize/Move button. 

Step 2.To resize a volume, drag the volume panel to the left or use the Partition size option to adjust the desired volume size, then click Proceed.

Step 3. Select the partition to expand the C partition after, then click Resize/Move to proceed.

Step 4. Drag the volume panel rightward or use the Partition size option to adjust the volume size you'd like to extend, and click Proceed.

Another Manual Way in Windows 10/11: Extend C Drive with DiskPart

Note: This part is not related to extending C drive space from another disk. Need to backup in case of data loss.

To free up space on your C drive using Diskpart, you can take advantage of its capabilities. However, keep in mind that it has limitations: if you only have one C drive and no unallocated space behind it, you may need to resort to software solutions like Qiling Partition Master to extend your system drive from another hard drive. Alternatively, if you have an adjacent drive behind your C drive, you can delete it using Diskpart and thereby increase the available space on your C drive.

Step 1. Type cmd on the search box. Right-click cmd and click "Run as administrator."

Step 2. Type diskpart and press Enter.

Step 3. Input command lines and hit Enter each time:

• list disk
• The command "select disk *" is used to specify the disk from which the command will operate. The "*" is replaced with the disk number of the system disk, which is usually "0". This command is typically used in the context of disk management and is a precursor to other disk-related commands. For example, if the system disk is on disk 0, the command would be "select disk 0".
• list volume
• select volume * (Replace * with the partition number. Please back up important files on volume first.)
• delete volume
• select volume * (Replace * with the disk number of your C drive.)
• extend size =number (Normally, the default size unit is MB.)
• Exit

To expand your C drive, you'll need to restart your computer in safe mode, delete the pagefile.sys file, and then restart your computer normally.

Final Thoughts

If you're running low on space on your C drive and have a second disk available, Qiling Partition Master can help you extend the C drive by utilizing the second disk. This is a straightforward solution that we've found to be effective, and it doesn't require any external devices.

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