Merging Two Drives in Windows 10
Merging two drives in Windows 10 involves combining two separate partitions on your hard drive into a single one. This task requires using the built-in Disk Management tool. Here’s the quick version: Back up your data, delete the partition you want to merge, and then extend the remaining partition to cover the unallocated space.
How to Merge Two Drives in Windows 10
This section will walk you through merging two drives in Windows 10. Follow these steps to make sure you don’t lose any data and successfully combine your partitions.
Step 1: Backup Your Data
Before you start, you need to back up all important data from both drives.
Backing up your data is crucial because merging partitions will delete information on the second drive. Use an external drive or cloud storage to save your files.
Step 2: Open Disk Management
Next, you need to access the Disk Management tool.
Press Win + X and select "Disk Management" from the menu that appears. This tool allows you to manage your partitions and drives.
Step 3: Delete the Second Partition
In Disk Management, find the partition you want to merge into the other and delete it.
Right-click on the second drive (the one to be merged) and select "Delete Volume." Confirm the action. This will turn the space into unallocated space.
Step 4: Extend the First Partition
Now, extend the first partition to include the unallocated space.
Right-click on the first partition (the one you want to keep) and select "Extend Volume." Follow the wizard to add the unallocated space to this partition.
Step 5: Finish and Verify
Finally, check to make sure everything is fine.
Open "File Explorer" and verify that the drive now shows the combined space of both partitions. Make sure your data is intact.
After completing these steps, you’ll have a single drive with the combined space of both original partitions. All your data should now be in one place, making it more convenient to manage.
Tips for Merging Two Drives in Windows 10
- Always back up your data before starting. This ensures you won’t lose anything important.
- Use Disk Management carefully. Deleting a partition will erase all data on it.
- Make sure you have administrative rights. Only admins can manage disk partitions.
- Consider defragmenting the drives before merging. It can help in reallocating space efficiently.
- If you’re unsure, consult a professional. Merging drives can be tricky and sometimes things can go wrong.
Frequently Asked Questions
Can I merge drives without losing data?
No, merging drives will delete data on the second partition. Always back up your data first.
What if I can’t see the unallocated space?
You may need to refresh Disk Management or restart your computer.
Is there a risk of data loss?
Yes, there is always a risk. This is why backing up your data is vital.
Can I undo the merge?
No, once you merge and extend a partition, you cannot undo it. You would have to repartition the drive and move your data again.
Do I need third-party software?
No, Windows 10’s Disk Management tool can handle merging partitions without any additional software.
Summary
- Backup your data.
- Open Disk Management.
- Delete the second partition.
- Extend the first partition.
- Verify the merge.
Conclusion
Merging two drives in Windows 10 might seem like a daunting task, but it’s quite simple when you break it down into steps. Always remember to back up your data before you start, as this process will delete information from the partition you’re merging. Disk Management is a powerful tool that can handle the job without needing third-party software.
Following our step-by-step guide ensures you’ll end up with a single, larger partition, making it easier to manage your files. If you hit any roadblocks, don’t hesitate to consult additional resources or professionals. Now that you know how to merge two drives in Windows 10, you can streamline your storage and improve your workflow.

Matt Jacobs has been working as an IT consultant for small businesses since receiving his Master’s degree in 2003. While he still does some consulting work, his primary focus now is on creating technology support content for SupportYourTech.com.
His work can be found on many websites and focuses on topics such as Microsoft Office, Apple devices, Android devices, Photoshop, and more.