How to Merge Two SSDs on Windows 11

If your PC has more than one SSD and you want to combine them into a single larger drive, you can easily do that in Windows 11. Whether you’re trying to manage space more efficiently, simplify file storage, or create a high-capacity drive for games and media, Windows offers multiple ways to merge or pool SSDs — without relying on third-party tools.

In this guide, we’ll walk you through how to merge two SSDs on Windows 11 using Storage Spaces, Disk Management, and third-party alternatives for advanced flexibility.

Merge Two SSDs on Windows 11

You’ll need a Windows 11 PC with at least two SSDs connected — either internal drives (SATA or NVMe) or external SSDs via USB-C.

Tip: Back up all data before proceeding. Merging drives often requires reformatting, which erases existing data on the SSDs.

Step 1: Understand Your Options for Merging SSDs

Windows 11 doesn’t let you simply “combine” two SSDs into one without some setup, but you can achieve this by:

• Storage Spaces: A built-in Windows feature that lets you combine multiple drives into one virtual volume.
• Dynamic Disks (Spanned Volume): Combines multiple drives into a single logical drive via Disk Management.
• Third-party partition managers: Offer advanced merging options, including cloning and dynamic volume resizing.

Storage Spaces is the safest and most flexible option for most users, while Disk Management works for simple setups.

Step 2: Open Storage Spaces in Windows 11

Storage Spaces allows you to create a single virtual drive that spans multiple SSDs — similar to a RAID configuration but simpler to manage.

1. Press Windows + S and type Control Panel, then open it.
2. Go to System and Security → Storage Spaces.
3. Click Create a new pool and storage space.
4. Select the SSDs you want to merge and click Create pool.

Once the pool is created, Windows will treat both SSDs as one unified storage space.

Step 3: Configure the New Storage Space

After creating the pool, you’ll need to set up the virtual drive:

1. Choose a Drive letter (like D: or E:).
2. Under Resiliency type, select one of the following:
   • Simple (no resiliency): Combines the total capacity of both drives (best for maximizing space).
   • Two-way mirror: Duplicates data on both SSDs (reduces total capacity but adds redundancy).
3. Set the Size (you can allocate the full combined capacity).
4. Click Create storage space.

Once complete, your two SSDs will appear as a single, large drive in File Explorer.

Step 4: Merge SSDs Using Disk Management (Alternative Method)

If you don’t want to use Storage Spaces, you can use Disk Management to create a spanned volume. This method is straightforward but less fault-tolerant — if one SSD fails, you lose all data.

1. Press Windows + X and select Disk Management.
2. Right-click one of the SSDs and choose Delete Volume (ensure it’s backed up first).
3. Do the same for the second SSD to make both drives Unallocated.
4. Right-click one of the unallocated drives and choose New Spanned Volume.
5. Follow the wizard and select the second SSD when prompted.
6. Assign a drive letter and choose NTFS as the file system.
7. Click Finish to merge them.

Windows will now display both SSDs as a single combined volume under “This PC.”

Step 5: Format and Confirm the New Drive

After creating the merged volume, it’s essential to format it properly:

1. Open File Explorer → right-click the new drive → Properties.
2. Confirm the File System is NTFS and the total size reflects both SSDs combined.
3. Optionally, rename the volume (e.g., “Combined SSD”).

You can now start saving files, installing apps, or using the drive like any other storage volume.

Step 6: Use Third-Party Tools (Optional)

If you want more control over partition management, you can use reliable third-party software such as:

• EaseUS Partition Master
• AOMEI Partition Assistant
• MiniTool Partition Wizard

These tools can merge partitions, resize drives, or migrate data between SSDs without manually reformatting.

For example, AOMEI Partition Assistant’s “Merge Partitions” feature lets you merge unallocated space or multiple drives into one dynamic volume with just a few clicks.

Step 7: Check Drive Health and TRIM Support

After merging your SSDs, make sure both drives remain healthy and optimized:

1. Press Windows + X → Terminal (Admin).
2. Type: fsutil behavior query DisableDeleteNotify
   • If the result is DisableDeleteNotify = 0, TRIM is enabled (good).
3. You can also run: wmic diskdrive get model,status This checks the SMART status of your SSDs — it should read “OK.”

This ensures that your drives continue performing efficiently after merging.

Step 8: Back Up Regularly

When combining drives using Storage Spaces or spanned volumes, always keep regular backups. If one SSD fails in a Simple or Spanned configuration, all data on the merged drive could be lost.

Use File History, OneDrive, or an external backup drive to protect critical files.

Wrapping Up

Merging two SSDs on Windows 11 is straightforward thanks to built-in tools like Storage Spaces and Disk Management. Whether you want to create a high-capacity single drive for storage or simplify file management, these methods let you combine drives quickly and safely.

For the best performance and flexibility, we recommend using Storage Spaces with a Simple layout. If you prioritize speed and don’t mind some risk, spanned volumes are a faster alternative.

Once set up, you’ll have one seamless, high-capacity SSD volume — perfect for gaming, editing, or managing large project files.