How to Partition An External Hard Drive Windows 10/8/7

Jean updated on Jul 29, 2020 to Partition Master | How-to Articles

What's the Purpose of Partitioning An External Hard Drive?

Computer users, especially Windows users, are accustomed to having 2-5 partitions for different purposes. Usually, a new hard drive is shipped with one primary C drive, so you need to make other D, E, F, G on your own. If you have an external hard drive connected, do it the same way, to make as many partitions as you need. Splitting a single physical external hard drive into multiple drives can bring many noticeable benefits. For example, by separating data and other components across multiple drives can let people well organize various types of data. Other benefits like backup convenience, data security, and hard drive speed are also concerned.

How to Partition An External Hard Drive Without Erasing Data

Here we'll introduce readers two free methods to partition an external HDD, SSD or USB hard drive without destroying data. One is to try famous free partition manager software called EaseUS Partition Master, and the other is Windows Disk Management.

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 Windows 10 is supported

Solution 1: Partition External Hard Drive Windows 10 by EaseUS Partition Master

Usually, a professional partition management software can make it possible and simple for ordinary users to manage their computer hard disks. Compared with Windows Disk Management, EaseUS Partition Master shares similarities in being able to resize, create, format, or delete a partition, meanwhile, features other functionalities. For instance, hide or wipe a partition, merge two partitions into one, convert to basic disk without deleting partitions, transfer OS to SSD, etc. These featured options are not available in Disk Management.

Quick Access to Hard Drive Partitioning

Step-by-step Guide:


Step 1: Launch EaseUS Partition Master

On the main window, right-click on the unallocated space on your hard drive or external storage device and select "Create".

Create partition on unallocated space

Step 2: Adjust the new partition size, file system, label, etc.

Set the size, partition label, drive letter, file system, etc. for the new partition and click "OK" to continue.

Set up new partition

Step 3: Confirm to create a new partition

Click on the "Execute Operation" button and confirm to create a new partition by clicking "Apply".

Confirm and keep all changes

Solution 2: Partition External Hard Drive Windows 10 by Disk Management

Disk Management is a Windows built-in partition management tool in Windows 10/8/7. It provides users with basic operations, such as extend/shrink a volume, create a new one, change drive letter and paths, and convert a hard disk between basic and dynamic. 

Step 1. In Windows 10, follow the path to open Disk Management: This PC > Manage > Disk Management.

Step 2. Right-click the external hard drive and select "Shrink Volume". Enter the amount of space you want to shrink in MB as shown below then click on the Shrink button.

Windows 10 disk management 1

Step 3. Right-click on the unallocated space and select "New Simple Volume".

Windows 10 disk management 2

Step 4. Enter the New Simple Volume Wizard interface by clicking Next and specify volume size.

Windows 10 disk management

Step 5. Assign "Drive Letter or Path", then format the partition into default file system NTFS. Click "Finish" to complete creating a new partition in Windows 10.

Windows 10 external hard drive partition


This article primarily talks about how to partition an external hard drive, like an HDD/SSD/USB drive/Removable disk, in Windows operating systems. Within which, it introduces two capable disk partitioning utilities for help: [1] EaseUS Partition Master Free; [2] Windows Disk Management. Both are capable of solving the problem of partitioning a new & old external hard drive into many blocks. 

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 Windows 10 is supported

If you're interested in EaseUS Partition Master's way of partitioning a hard drive and would like to learn more about such a versatile software, this video has a brief introduction for you.

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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.

Video Tutorial

How to Partititon a Hard Drive on Windows 10/8/7