How to Recover Lost Partition on External Hard Drive

In this passage, you'll learn how to recover lost partitions on an external hard drive. We'll offer four tested methods with detailed tutorials to help you recover lost partitions and data successfully. 

 Download for Win Recovery Rate 99.7%
 Download for Mac Trustpilot Rating 4.7

Page Table of Contents

Updated By


Written By


Updated on

20 May 2024

Min Reading

9 Min

While using an external hard drive to store files and folders, the data is not 100% safe, and you'll even lose partitions because of accidental deletion, computer viruses, corrupted partition tables, and disk errors. How to recover a lost partition on an external hard drive? Keep reading to find detailed tutorials on each method.

Fix 1. Recover Data from Lost Partitions on an External Hard Drive with Recovery Software

Have you encountered accidental partition deletion? You can apply professional partition data recovery software - EaseUS Data Recovery Wizard to recover data from lost partitions on an external hard drive. You can download and install this software now, and we'll introduce the detailed steps to help you recover data.

 Download for Win Recovery Rate 99.7%
 Download for Mac Trustpilot Rating 4.7

By the way, you should know that it will be harder if you keep writing new data on this external hard drive. So, stop using this disk when the partition gets deleted or lost.

The EaseUS partition data recovery tool makes it easier to recover data from deleted partitions on an external hard drive. You can discover plenty of deleted photos, Microsoft documents, and videos on the external hard drive's lost partition with the help of EaseUS data recovery. This recovery product can also help you recover formatted external hard drives.

Let's start the recovery process now:

Step 1. Select and scan the lost partition

Launch EaseUS Data Recovery Wizard, select "Lost Partition" and click "Search for Lost Data" to search for all the lost data. If there are many lost partitions, you can identify them through its partition size.

Note: Since the Windows system doesn't support the Linux file system, the Ext2 or Ext3 partition will be recognized as lost partition with no drive letter in the software. If you want to recover data from Ext2/Ext3 partition, you can follow these steps.

select the lost partition to scan

Step 2. Filter the scanned results

Because there will be a lot of scanned files, you can choose a file category for quick filtering, such as Pictures, Videos, Documents, Audio, and Others. Or if you remember the file name, you can just look it up in the search box in the upper right corner.

check all found files

Step 3. Preview and recover data from the lost partition

Before recovery, you can preview the file to make sure it is the data you need. Choose all the files you need and click "Recover" to restore them. Choose a storage location (including cloud storage, such as OneDrive, Google Drive, etc.), and click "Save" to save your recovered files.

recover files from lost partition

Have you recovered data from the deleted partition on the external HDD with EaseUS? If yes, you can transmit this passage on social media by clicking the buttons below.


Fix 2. Restore Lost External Hard Drive Partitions with TestDisk

How much do you know about TestDisk? It is an open-source partition recovery software. It is better to choose EaseUS data recovery software if you are unfamiliar with the advanced command line operations.

Follow the leads and try to use TestDisk to restore lost partitions:

Step 1. First, you can download TestDisk from the official website and run the exe files to install it.

Step 2. After launching this tool, you should choose "Create" to create a new log file.

reading the disk location while creating the log file

Step 3. Then, you'll see all the detected drives. Choose the target external hard drive that lost partitions. (You can use the up/down key to select.) Press the Enter key to continue.

choose the hard drive containing the lost partitions

Step 4. Choose the type of partition table and move on.

Step 5. Choose "Analyse" to analyse the current partition structure and search for lost partitions.

search for lost partitions

Step 6. Choose "Quick Search" to start the scanning process.

identify missing elements or errors

Step 7. After all the detected partitions are listed, you can press P to view files. In order to maintain the partition structure, hit "Write" after pressing "Enter" to continue.

Step 8. You'll be prompted to confirm that the partition table was written. Click "Yes" to confirm this action, then restart your computer.

Fix 3. Recover Lost Partitions on External Hard Drive with CMD

You can also use Command Prompt to recover accidentally deleted partitions. You'll need the diskpart command line to accomplish the partition recovery on an external hard drive. Check the tutorial below and get ready:

Step 1. Wake up the Command Prompt in Windows with the search box. Don't forget to run CMD as an administrator.

run CMD as administrator

Step 2. Type in the following commands one by one, and replace the number and drive letter with the correct one.

list disk
select disk 1
select volume 1
assign letter g

After entering these commands, you can access files in the lost partition now. You can also recover deleted files using CMD.

Learn more information from the following passage:

recover lost partition on external hard drive using cmd

Recover Lost Partition on External Hard Drive Using CMD

Do you want to use CMD to retrieve the lost partition on the external hard drive? Keep reading this article to discover more. Read more >>

Fix 4. Find Lost Partitions and Recover Data with Data Recovery Services

When you encounter issues and data loss on an external hard drive, and you cannot fix the problem by yourself, it is time to ask experts for help. Although EaseUS external hard drive recovery software is handy and can recover most lost files from the external HDD, it's difficult to recover data from a corrupted or formatted disk. That's why you need EaseUS data recovery services. Our engineer can help you resolve many problems on various devices. Click the following link to get a free professional recovery diagnosis now!

Consult with EaseUS data recovery experts for one-on-one manual recovery service. We could offer the following services after FREE diagnosis

  • Repair corrupted RAID structure, unbootable Windows OS, and corrupted virtual disk file
  • Recover/repair lost partition and re-partitioned drive
  • Unformat hard drive and repair raw drive(Bitlocker encrypted drive)
  • Fix disks that become GPT-protected partitions

The Bottom Line

Don't know you should choose which solution to perform partition data recovery on external hard drives? We recommend the first solution, applying the EaseUS Data Recovery Wizard. It is the simplest method and suits most external hard drive users.

 Download for Win Recovery Rate 99.7%
 Download for Mac Trustpilot Rating 4.7

If you want to learn more about this recovery tool, the following passage may help.

EaseUS Data Recovery Wizard review

EaseUS Data Recovery Software Full Review [Tested in 2023] - EaseUS

EaseUS Data Recovery Wizard is an easy-to-use data recovery software. In this post, we are going to show a full review of this tool. Read more >>

External HDD Partition Recovery FAQs

The following three questions and answers will help you learn more information about our topic:

1. How do I recover a lost partition on an external hard drive?

You can recover lost partitions on an external hard drive with the following methods:

  • EaseUS Data Recovery Wizard (Professional recovery tool)
  • TestDisk
  • Command Prompt
  • Data Recovery Services

2. Why was the partition on my external hard drive lost?

The partition on the hard drive may get lost because of many situations, such as accidental deletion, corrupted file systems, hard drive failure, malware attacks, computer viruses, etc.

3. How do I recover data from a lost external HDD partition?

It is wise to choose EaseUS Data Recovery Wizard to recover data from a lost external hard drive partition. With this functional tool, you can easily get back most files from the lost partition, including photos, documents, emails, and videos.

  • Updated by

    Cedric Grantham is a senior editor and data recovery specialist of EaseUS. He mainly writes articles and how-to tips about data recovery on PC and Mac. He has handled 10,000+ data recovery cases and is good at data recovery of NTFS, FAT (FAT32 and ExFAT) file systems, and RAID structure reorganization. …
  • Written by

    Dany is an editor of EaseUS who lives and works in Chengdu, China. She focuses on writing articles about data recovery on Mac devices and PCs. She is devoted to improving her writing skills and enriching her professional knowledge. Dany also enjoys reading detective novels in her spare time. …
Why Trust EaseUSEditor Reviews


Years of experience


Countries and regions

72 Million+


4.7 +

Trustpilot Score

Data Recovery Service