By Bryce / Last Updated November 30, 2020

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 the system. But it is not disappearing from the external hard drive forever and is able to be recovered.

You can recover the deleted partition on the external hard drive easily as long as you apply a proper partition recovery tool. Here AOMEI Partition Assitant Professional will be my first choice due to its highlights listed below:
Powerful: with strong technical support, it not only enables you to recover lost partition on external hard drive but to recover deleted boot partition on system disk.
Easy-to-use: It is designed with an intuitive and simple user interface, thus it is able to be operated effortlessly to recover lost partition even for a 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.

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 (Take recovering deleted partition in Windows 10 as an example).

What you should keep in mind to avoid further data loss before recovering partition:

  • Don’t format the external hard drive

  • Don’t rewrite to the partition.

  • Don’t rebuild partition table of the external hard drive.

► You can download the demo version to have a try!

Download Demo Win 10/8.1/8/7/XP
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Step 1. Install and run the partition recovery tool. Click“Partition Recovery Wizard” on the left panel and choose the external hard drive that contains the lost partition and click “Next”.

Step 2. Here offers you two search modes. Choose one and click “Next”. (The first one, Fast Search is recommended as it takes less time).

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

Step 3. 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 partitions to view the files in the partition).

Step 4. 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 no drive letter, it will not show up in Windows Explorer. In such a condition, you can restart the computer and run AOMEI Partition to assign a drive letter to it.

  • After recovering the partition, the files on the deleted partition will be recovered as well. But for recover files from a 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 external 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.