Want to know how to recover unallocated partition with data on it? Here, two solutions are listed. Try to use the methods to recover data from unallocated hard drive space with the professional MiniTool software and it would not bring any damage to the original data. 

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:

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.www.tomshardware.com

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.

  1. Virus attack
  2. Improper operation such as mistaken deletion, unplugging drive improperly from PC (Read more: Accidentally Deleted Recovery Partition? Solutions Are Here!)
  3. Hardware failure
  4. File system error
  5. Hard drive driver is outdated
  6. More...
Tip: 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 hard drive without losing data in Windows 10/8/7. In the following part, there are 2 excellent ways for you to get unallocated hard disk space back.

Way 1: Recover Unallocated Partition Windows 10/8/7 with MiniTool Partition Wizard

If your drive (including computer internal/external hard 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 recover 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 10/8/7 without Losing Data

This software has Free Edition for you to use but it can only scan the lost partitions not recover them. Here, you can download it on your computer to try whether it can find the files you want to recover and then you can decide to get a full version or not.

Free DownloadBuy Now

LOOK! The following is how to recover unallocated partition with data on it.

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 context menu.

click Partition Recovery feature

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

choose scan range

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

select a scan method

Step 5: Select all needed partitions including existing partitions and deleted/lost partitions, and then click the 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.

choose all found partitions to recover

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

explore partition to check it is the target partition

If you are using the Free Edition to recover partition, you will get a window to ask you to upgrade to advanced edition to recover unallocated hard drive space without losing data.

Buy Now

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.)

change drive letter

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

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

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

"I effectively recover data from unallocated hard drive space with MiniTool Partition Wizard. To help more people know how to recover unallocated space in hard drive in Windows 10/8/7, I want to share this tool with all of you."Click to Tweet

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

As we have 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 unallocated partition in Windows 10/8/7 without damaging the original data?

Want to know the best way?

Move 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, 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.

To recover unallocated partition data, get this software. Here you can try the Trial Edition (only scan but not support recovery) to check whether it can help to find the files you need after scanning the unallocated hard disk space. If yes, to complete the recovery operation, just upgrade to the Personal Deluxe.

Free Download

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

Step 1: launch MiniTool Power Data Recovery to get its main interface, and then you can see 4 different modules.

  • Hard Disk Drive fully supports data recovery from hard disk including mistakenly deleted partitions and drives without partition table because of virus attack.
  • Removable Disk Drive can help you recover photo, music and video files from storage devices such as memory cards and USB flash drives.
  • CD/DVD Recovery is available for users to recover deleted or lost data from formatted or scratched CD/DVD.
  • This PC is designed to recover data from logically damaged, formatted and RAW partitions. In general, the lost file could be recovered by using this module as long as the partition exists.

Here select Hard Disk Drive to recover data from unallocated hard drive space. And choose the target disk, click the Scan button to begin searching partitions on it. This function will scan the whole device, collect and analyze every byte on the device.

choose Hard Disk Drive feature to recover data from unallocated hard drive space

Tip: If the device is not found on the list, please click the 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.

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

choose specific file types before scanning

Step 2: This data recovery software will start to scan the target disk. To ensure the best recovery result, please wait patiently until the scan completes.

scanning the hard drive

Step 3: Finally, check all the files you want to recover, click the Save button, select a place to save checked files, and click OK button.

Note that never save the needed files to the drive where you lost your data. Otherwise, the lost/deleted files will be overwritten.

check needed files to recover to a safe place

1. If you are recovering pictures or .txt files, you can preview them before saving. Note that the single picture or .txt file should be smaller than 20MB; otherwise, it cannot be previewed.
2. You can click the Filter icon to filter out needless files by extension, size, filename, or date, which is good for promoting file recovery efficiency.
3. In addition, Show Lost Files and Find options are helpful for you to quickly find needed files.

See, by using MiniTool Power Data Recovery, you can effectively, quickly and safely recover data from unallocated hard drive space in Windows 10/8/7 within 3 steps. Now, get this software to have a try.

Free Download

Hi! With MiniTool Power Data Recovery, I quickly and effectively recovered lost data without damaging the original data. Now, recommend this professional and read-only tool to all of you.Click to Tweet

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

Move 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 Partitionfeature 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.

add the unallocated space to a 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 Volumeand 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 new partition on the unallocated space

Finally, click Apply to perform all changes.

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

Click to Tweet

Bottom Line

Are you still worrying about how to recover unallocated partition in Windows 10/8/7 without losing the original data? Now, you can try the above-mentioned two methods to recover unallocated partition with data on it.

Like this post? Share it to help more users get rid of the unallocated space error!

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

Unallocated Partition FAQ

What is an unallocated space?
Unallocated space is a logical space on your hard drive, but you cannot write any data to this partition. To make use of the unallocated space, you can create a new partition on it or add this space to another existing partition.
How do I allocate unallocated space in Windows 10?
  1. Right-click This PC, and select Manage.
  2. Click Disk Management.
  3. Right-click the unallocated space and select New Simple Volume.
  4. Enter the size and click next and you are done.
How do I assign unallocated space to C drive?
  1. Launch MiniTool Partition Wizard.
  2. Right-click C drive and choose Extend Partition,
  3. Choose the unallocated space.
  4. Drag the sliding handle leftwards or rightwards to decide how much space to take.
  5. Click OK and Apply button to perform all changes.
How do I merge partitions?
  1. Launch MiniTool Partition Wizard.
  2. Select the source partition and click Merge Partition from the left action panel.
  3. Click Next button to continue.
  4. Select the partition that will be included to the target one, and click Finish.
  5. Click Apply button in the upper left corner to confirm.
  • Linkedin
  • Reddit