How to Recover Lost/Deleted Partition on External Hard Drive Easily?

November 1, 2018

If you lose your partition due to various reasons like accidental deletion, loss of drive letter and so on, read this article to get how to recover lost partition quickly and easily.

Can I retrieve my lost partition on external hard drive?

“I have an I TB Seagate external hard drive connected to my Windows 7 based computer. There are three partitions on it, assigned as E, F and G. E drive is almost full with data saved and I need to delete F drive to get unallocated space to extend it. But I delete E drive accidentally. Is it possible to recover it? If so, can you tell me how to recover lost partition on external hard drive? I’m totally not willing to lose the partition and files on it. Thanks!”

Partition recovery software will be helpful!

If you have deleted one partition on the external hard drive, is the partition really missing from the external hard drive? The answerer is No! The deleted partition is not showing up in Disk Management or File Explorer as the partition information like partition type, location and etc is removed by system. But it is not disappearing from the external hard drive forever and is able to be recovered. In such condition, you can apply a partition recovery tool. Among a great number of partition recovery software, AOMEI Partition Assistant Professional is recommended due to its highlights listed below:

  • Easy-to-use: It is designed with intuitive and simply user interface, thus it is able to be operated effortlessly to recover lost partition even for green hand in computer knowledge.

  • Compatible: It can work with Windows 10/8.1/8/7, XP and vista, satisfying computers installed with different versions of Windows.

  • Comprehensive: with strong technical support, it not only enables you to recover lost partition on external hard drive but to recover deleted boot partition. Besides, it is featured with many other helpful functions such as copying hard drive to SSD without reinstalling.

Recover lost or deleted partition step by step

Refer to the following steps to learn how to recover lost partition using this powerful partition recovery software – AOMEI partition Assistant professional (supposed that your computer is runnign with Windows 10).

Note: Before recovering partition, to avaoid further data loss, don’t format the external hard drive, rewrite to the partition on the external hard drive and or rebuild partition table of the external hard drive.

Step 1. Download and install the demo version of AOMEI Partition Assistant Professional. Launch it and click “Partition Recovery Wizard” on the left panel.

How to Recover Lost Deleted Partition External Hard Drive

Step 2. In the pop-up window, choose the external hard drive that contains lost partition and click “Next”.


Step 3. Here offers you two search modes. Choose one and click “Next”. (The first one, Fast Search is recommended as it takes less time).

Two Search Modes

PS.: If “Fast Search” fails to find out the lost partition, try further method, “Full Search” to search every sector of each partition on the selected external hard drive.

Step 4. Then, the lost/deleted partitions will be listed. Choose the one that you want to recover and click “Proceed” (If you are unsure, click Explorer files in the selected partitionsto view the files in the partition).

Select Lost Partition

Step 5. When you are prompted that the partitions have been recovered successfully…, click "Finish". Then, open Disk Management and you’ll find the lost or deleted partition.


  • If the recovered partition has not drive letter, it will not showing up in Windows Explorer. In such condition, you can restart computer and run AOMEI Partition to assign a drive letter to it.

  • After recovering partition, the files on the deleted partition will be recovered as well. But for recover files from formatted, corrupted partition, it is advised to turn to data recovery software.


Now, you must have realized how to recover lost or deleted partition on eternal hard drive via AOMEI Partition Assistant. Actually, this software can help you solve other problems as it has many powerful features. For example, when your C drive is full, you can use Allocate Free Space feature to extend C drive via allocating free space from another partition to partition C. If you have accidentally converted basic to dynamic, it can convert it back to basic without data loss.