> Recover Unallocated Partition with Data on It

How Do I Recover Unallocated Partition with Data on It

Look! Here we share with you two excellent ways to recover unallocated partition with data on it in Windows 10/8/7.

Hard Drive Suddenly Became "Unallocated"...

Hard drive/external hard drive/USB drive becomes unallocated? Have you ever encountered this issue? What should you do if the unallocated partition contains some important data? Don't worry. This post will show you how to effectively recover unallocated partition with data on it.

What Does It Mean When a Hard Drive Is Unallocated?

First, let's see a true example from www.tomshardware.com:

I accidentally deleted a partition that was not to be deleted when re-installing windows and as soon as realized I canceled the setup but the partitions are gone, now the disk is unallocated and I need to recover the lost partition. Can someone please help me to recover it? All of my data is in that partition. Please I really need help.

Unallocated space, sometimes called free space, is logical space on a hard drive that the operating system, e.g Windows, can write to. You cannot use this space without allocation. This means that no programs can be written to the space.

To make use of unallocated space, you need to either create a new partition by using the space or expand an existing partition. However, what if this unallocated space contains massive important files? In this case, you should try other ways to fix unallocated hard drive space. Or, you have to transfer all data on this unallocated space before creating partition or extending partition.

Why Does Hard Drive/External Hard Drive/USB Flash Drive Become Unallocated?

What makes your drive becomes unallocated? There are many reasons that can cause unallocated hard drive.

Tips: If your hard drive becomes unallocated, you should stop writing new data to the space, Meanwhile, please use a professional recovery tool to start the hard drive data recovery immediately. Otherwise, the original data on the unallocated space will be overwritten.

Now, it's time to learn how to fix unallocated space in Windows 10/8/7 without affecting the original data. Generally, there are 2 excellent ways to get back unallocated hard disk space without losing its data.

Way 1: Recover Unallocated Partition with MiniTool Partition Wizard

If your drive (including computer drive, USB drive, SD card, etc.) becomes unallocated suddenly, you don't need to worry about this. MiniTool Partition Wizard is a good option for recovering unallocated partition in Windows 10, Windows 8, Windows 7, and so on. This professional tool offers Partition Recovery feature to help you easily and quickly recover unallocated partition and data as long as new partition has not been created on this unallocated space. Besides, this professional partition magic offers wizard-based interfaces as well as simple operations which can help users effectively get back unallocated hard disk space without any difficulty.

Watch the Following Video to Know Unallocated Space Recovery.

Step-by-step Guide to Fixing Unallocated Hard Drive Space in Windows 10/8/7without Losing Data

You can try using the free MiniTool Partition Wizard edition to scan your lost or deleted partitions if you still have a bit hesitation whether you should invest in this professional partition recovery software.


Step 1: Connect your unallocated drive to PC, and then launch MiniTool Partition Wizard to get its main interface.

Step 2: Select the disk where unallocated partition appears and then click Partition Recovery feature from the left action panel or from the toolbar.


Step 3: Choose a scanning range from Full Disk, Unallocated Space, and Specified Range, and then click Next button. Here, we can click Full Disk to scan the whole hard drive.

full disk

Step 4: Set scanning method like Quick Scan to scan the specified range and click Next to continue.

quick scan

Step 5: Select all needed partitions including existing partitions and deleted/lost partitions, and then click Finish button to go back to the main interface of MiniTool Partition Wizard. WARNING: You Must Check All Partitions You Want. Otherwise, the unchecked ones will be deleted after partition recovery.

check all partitions

Before checking partitions, you can double-click the found partition to check its files, as shown below.

check files

Tips: Here, since you are using the free edition to recover partition, you will get this window after clicking Finish button.


Now, you need to upgrade to advanced edition to recover the unallocated hard drive partition without losing data.

Step 6: Select the recovered partition and click Change Drive Letter feature to assign it drive letter, thus you can see it in Windows Explorer. (It is Optional.)

Step 7: Click Apply button on the top left corner to perform all changes.

See! It is very easy to recover unallocated partition with data on it, isn't it?

recommend Top Recommendation: Free Recover Data from an Unallocated Hard Disk Space.

Way 2: Fix Unallocated Hard Drive with MiniTool Power Data Recovery

As we said above, if you want to fix unallocated hard drive space without losing data, you should recover data from unallocated space and then create a new partition on this unallocated space or add the unallocated space to existing partition.

Now, you might be wondering:
"How to recover files from unallocated hard drive space without damaging the original data?"

Want to know the best way?

Step 1. Recover Data from Unallocated Hard Drive Space in Windows 10/8/7

When it comes to unallocated hard drive data recovery, MiniTool Power Data Recovery 7.5, a green, and professional data recovery software developed by famous software development company, proves to be an excellent choice. With this all-in-one software, you are able to easily, quickly and effectively recover lost data from unallocated hard drive space without damaging the original data because of its high recovery rate, easy recovery operations, and high security. It is no exaggeration to say, even our grandmother can easily use this read-only tool to carry out unallocated hard drive data recovery. And, it has good compatibility. Various common file systems (like FAT12, FAT16, FAT32, VFAT and NTFS) and operating systems (like Windows XP, Windows 7, Windows 8 and Windows 10) can be compatible with all modules of MiniTool Power Data Recovery. And this professional data recovery software allows you to recover files from not only hard disk, but also flash drive, memory card and flash card.

MiniTool Power Data Recovery 7.5 offers free edition, personal license and business license to cater to the needs of different people. Click Compare License Type to know which license type is the best for you. Here, you can try the Free edition.

Now, how do you perform unallocated hard drive data recovery with MiniTool Power Data Recovery?

Firstly, launch MiniTool Power Data Recovery to get its main interface, and then select Lost Partition Recovery to recover data from unallocated hard drive space.

lost partition recovery

In the main interface of MiniTool Power Data Recovery, we can see 5 different modules.
  • Undelete Recovery recovers files mistakenly deleted from Windows Recycle Bin or by using SHIFT+DELETE keys.
  • Lost Partition Recovery fully supports data recovery from hard disk including mistakenly deleted partitions, and drives without partition table because of virus attack.
  • Digital Media Recovery can help users recover photo, music and video files from storage devices such as memory card and USB flash disk.
  • CD/DVD Recovery is available for users to recover deleted or lost data from formatted or scratched CD/DVD.
  • Damaged Partition Recovery is designed to recover data from logically damaged, formatted and RAW partitions. In general, lost files could be recovered by using this module as long as the partition exists.

Second, choose the target device and then click Full Scan button to begin searching partitions on it. This function will scan the whole device, collect and analyze every byte on the device.
If the device is not found on the list, please click Refresh button to make the device seen in the list. Here, I guess you might be interested in this post: Solved - External Hard Drive Not Recognized.

full scan

  • If you have scanned this drive, now, you can click the Previous Scan Result of "Lost Partition Recovery" and then click Load Result to directly open the scan result in a neat tree view, which can save time spent in scanning the same device for the second time.

    scan result

    However, MiniTool Power Data Recovery Free Edition does not support to load previous scan result. To use this function, please upgrade to advanced license.

  • If you only want to recover some specified file types, you can click Settings feature before scanning.


Finally, check all files you want to recover, click Save button, select a place to save checked files, and click OK button. Never save the needed files to the drive where you lost your data. Otherwise, the lost/deleted files will be overwritten.


  • If you are recovering pictures or .txt files, you can preview them before saving, as shown below.


  • You can click this "filter" icon to filter out needless files by extension, size, filename, or date, which is good for promoting file recovery efficiency.

    advanced filter

See, by using MiniTool Power Data Recovery, we can effectively, quickly and safely recover data from unallocated hard drive space in Windows 10/8/7 within 3 steps.

TIPS: The Free edition of MiniTool Power Data Recovery can only recover 1GB data. If you wish to recover more than the 1GB data, you can choose a paid edition.

Video Tutorial for How to Recover Data from Unallocated Space

After recovering data, let's see how to make use of this unallocated hard drive space.

Step 2. Fix Unallocated Hard Drive Space in Windows 10/8/7

To allocate unallocated space on a hard drive, you have 2 options: add the unallocated space to a partition or create new partition on the unallocated space.

Option 1: How do I add unallocated space to a partition?

Launch MiniTool Partition Wizard.

Select any existing partition on the drive containing unallocated space, and then click Extend Partition feature from the left action panel.

Choose unallocated space from the drop-down list of "Take Free Space from", drag the sliding handle rightwards, and click OK to continue.

extend partition

Finally, click Apply to perform changes.

If the whole hard drive becomes unallocated space, you should choose option 2 to get back unallocated hard disk space.

Option 2: How do I create a new partition on the unallocated space?

Launch MiniTool Partition Wizard.

Select the unallocated space, and then click Create Partition feature from the left menu.

Then, confirm Partition Label, Partition Type, Drive Letter, File System, Cluster Size, Partition Volume and Partition Location, and click OK button to go back to the main interface of the software. If you make no change here, all these parameters are kept by default.

create partition

Finally, click Apply to perform all changes.

recommend Top Recommendation: Best Way to Create Partition on Windows 10/8/7/Vista/XP

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Bottom Line

Are you still worrying about how to fix your unallocated hard drive space in Windows 10/8/7 without losing the original data?

Now, you can try the above-mentioned two methods to recover unallocated partition as well as its data.

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Should you have any questions or suggestions, please feel free to contact us via [email protected].