In this article, you will learn 5 methods and how to recover unallocated partition on Windows 10 or 11 first. It's suggested to recover your data first if you don't want to lose any data loss.
“I partitioned my existing 500g drive and tried to copy the C drive to it and go with that. I used a tool to clone the drive and it deleted the partition. The partition becomes an unallocated space. How do I get unallocated space back on Windows 10? Is there any way to recover the lost files?” – Reddit
Have you ever run into a situation where a hard drive suddenly becomes unallocated? You may be at a loss for words, especially with important data on it. Take a deep breath and calm down! It's possible to recover unallocated partition on Windows 10. The same goes for Windows 11. Please continue reading to learn more.
In general, a hard drive is divided into several partitions and has their own file system, drive letter, etc. You can then use it to store any data you want, such as the operating system, personal data, etc.
Instead, the unallocated space, sometimes called free space, does not partition and has any attribute. So you cannot write data to it. Also, it may be on a currently used disk. In this case, the data on it may become inaccessible.
In view of this, if your disk suddenly becomes unallocated, please stop using this disk and don't create a new partition on it before recovering data from unallocated drive. Otherwise, your data may be deleted forever.
You may want to recover unallocated partition with data on it right now. But only if you know the precise reasons, you can fix this issue and get your data back quickly. Also, it's meaningful to avoid the same scenario in the future.
In fact, there are many ways to fix unallocated partition, but some of them carry the risk of data loss. So we suggests you to data recovery software and fix this issue or directly use partition recovery software to get the entire partition and data on it back.
AOMEI Partition Assistant is a professional partition recovery software for Windows 10 or 11, which is able to scan your disk for deleted or lost partition and recover them quickly. You will use the Partition Recovery Wizard feature embeded two recovery modes, namely Fast Search and Full Search.
You could download AOMEI Partition Assistant Professional to recover unallocated partitions in Windows computers.
Step 1. Open AOMEI Partition Assistant. Then, select “Partition Recovery Wizard” on the left panel and the disk including unallocated partitions.
Step 2. Select Fast Scan as your search method and click “Next”. It is able to locate unallocated partition quickly.
Step 3. All the lost or deleted partitions will be listed in the following window. Select the unallocated partition and click “Proceed” to recover unallocated partition with data on it.
MyRecover is a comprehensive Windows data recovery software that specializes in different data loss scenarios, such as virus infections, partition loss, power outages, etc.
Step 1. Open Windows data recovery software - MyRecover. Hover the mouse over the drive and click Scan to scan.
Step 2. Filter your needed data and locate them quickly through Name, Type, Date modified, or Path.
Step 3. Go to the Deleted Files/Recycle Bin/Other Missing Files folder and select the data on unallocated partition. Then click “Recover x files” to begin the unallocated partition data recovery process.
After recovering data from unallocated drive, you can fix this issue with confidence. There are several methods below.
Creating a new partition is the easiest way to fix unallocated partition on Windows 10 or 11. Be sure your data is recovered and follow the steps below.
Step 1. Right-click the Start menu and select "Disk Management".
Step 2. Right-click the unallocated partition and select “New Simple Volume”.
Step 3. Follow the New Simple Volume Wizard to specify volume size, drive letter, and format options, and click Finish to confirm you want to create a new partition with unallocated space.
Sometimes, if your disk suddenly becomes unallocated, you need to manually delete the partition. One of the common ways is to use cmd.
Step 1. Type “cmd” in the search bar and select “Run as administrator”. Then, in the command prompt window, input"diskpart" and press Enter to open it.
Step 2. Input the following commands and press Enter after each one.
File system error or damaged disk can also cause unallocated partition on Windows 10 or 11. You can try chkdsk command to scan its file system and metadata for logical or physical error and fix them.
Step 1. Run cmd as administrator.
Step 2. In the command prompt window, type chkdsk #: /r or chkdsk D: /f /r and press Enter. Replace # with the drive letter of your unallocated space.
Directly fixing unallocated partition may cause irreversible data loss, so we recommend you recover data from it first. Here are two feasible ways to make it, namely using partition recovery software like AOMEI Partition Assistant or data recovery software - MyRecover. And then, you can fix unallocated partition with confidence.
Of course, the most important to avoid partitions and data loss is to make regular backups. Windows backup freeware-AOMEI Backupper is a rare excellent tool to back up, restore, and clone your disks and partitions.