EaseUS LockMyFile

EaseUS LockMyFile is a folder / file locker which protects user's privacy and important data from theft, loss or leaks.

  • Hide Files/Folders/Drives
  • Deny Reading and Writing Files/Folders/Drives
  • Monitor Folder Changing and Write Log
File lock

How to Password Protect an External Hard Drive Without Encryption on Windows 10 and Mac

Jean updated on Sep 22, 2023 | Home > File Lock

An external hard drive is equivalent to a mobile memory, which realizes data storage by simply connecting to a computer. You can use an external hard drive to back up files, free up space on SSD/HDD, or transfer files, specifically large files from one computer to another. The external hard disk is becoming more and more popular because it's small in size, large in capacity, and easy to carry.

An external hard drive can carry important and sensitive files, including private personally identifiable details, family photos, tax and financial information, login credentials, and more. Considering the security of your data, to prevent people with ulterior motives from stealing your data, you should encrypt and password protect the external hard drive.

password protect external hard drive

This post shows you how to password protect an external hard drive on Windows 10 in two ways. You can password protect files or folders on the external hard drive without encryption by using a file lock tool, or you can directly use BitLocker to password protect an external hard drive.

In addition, how-to steps to password protect an external hard drive on Mac are also provided. Let's learn how to do it.

How to Password Protect Folders on an External Hard Drive Without Encryption

A free file lock tool - EaseUS LockMyFile can help you password protect any type of files and folders on an external hard drive without encryption.

You can use its Locking File feature to protect the files or folders on a local hard drive, external hard drive, or USB flash drive with a strong password. Once you've set up the password, anyone accessing the files or folders on your external hard drive will need to enter the password first.

Here are the simple guides to password protect folders on an external hard drive with EaseUS file lock software.

Other highlighted features of EaseUS LockMyFile to protect data on external hard drive:

  • Password protect Seagate external hard drive, as well as Toshiba, WD, and other brands of external disks
  • Encrypt files or folders on an external hard drive with an AES encryption algorithm
  • Hide files or folders from external hard disk, completely invisible to anyone or any programs even under Windows Safe Mode
  • Support file shredder to completely delete data on external disk without recovery
  • Monitors disks or folders and their subfolders as the user makes any actions or change

Step 1. Download and install EaseUS LockMyFile on your computer. For the first time setup, enter a strong authentication password for use, and a valid email address for password retrieval in case you forgot the password. You can change the password anytime in "Settings".

enter password

Step 2. To lock files or folders on an external device, navigate to the "External Disk" section and then click "Locking File". Next, on the right menu, choose the "Lock File(s)" or "Lock Folder" option.

lock external drive file step 1

Step 3. Select the target external drive and choose specific files or folders you want password protect, and then click "Open".

lock external drive file step 2

Step 4. Enter the password and confirm it once, and click "Lock". Wait for the process to complete. Your important files and folders should be fully protected with a strong password.

lock external drive file step 3

How to Password Protect External Hard Drive Windows 10 Using BitLocker

Windows has an inbuilt-in disk encryption tool, named BitLocker. BitLocker comes with Windows 10 Enterprise and Pro, Windows 8 Professional and Enterprise, Windows 7 Ultimate and Enterprise, Windows Vista Ultimate and Enterprise, and Windows Server 2008 and later.

BitLocker lets you encrypt and password protect data on both internal and external hard drives. Because of version limitations, if you want to password protect an external hard drive in Windows 10 Home, go back to the above method and use EaseUS LockMyFile to make it.

Step 1.  Connect your external hard drive to the computer. Right-click the external hard drive and select "Turn BitLocker On". 

turn on bitlocker

Step 2. Set the password used to protect your external hard drive. Then, back up the recovery key to a secure place. If you forgot your password, you can access the drive with the recovery key. 

password protect usb

Step 3. If you want to protect the whole drive as well as newly added files and folders, choose "Encrypt entire drive". Or you can only choose to encrypt the used disk space. 

password protect entire usb

Step 4. Microsoft BitLocker offers two encryption modes. If you have the latest Windows version, you can choose "New encryption mode" with additional integrity support. Otherwise, select "Compatible mode" and then click "Next".

compatible mode

Step 5. Follow the on-screen instructions to finish encrypting the external hard drive. 

encrypt USB

How to Password Protect External Hard Drive on Mac

It's equally important to password protect external hard drives on Mac. If you haven't protected your external hard drives with a password till now, this is how to password protect external hard drives on Mac.

1. Password Protect an External Hard Drive by Using Disk Utility

When you format an external hard drive with Disk Utility on Mac, you can encrypt and protect it with a password in the steps below.

Step 1. Connect your external hard drive to the Mac.

Step 2. Go to "Finder > Applications > Utilities > Disk Utility". Or you can open Disk Utility by searching for it in Spotlight.

Step 3. Select your external disk on the left side menu, choose "Erase" in the toolbar. Remember to back up data before using this process.

erase external hard drive

Step 4. Enter a name for the drive. Then, click the "Format" option and choose "Mac OS Extended (Journaled, Encrypted)". 

format hard drive

Step 5. Click "Erase". Enter and verify a password, then click "Choose".  

Step 6. Finally, click "Erase" and "Done". When the process is finished, you will see that your drive is encrypted and you need to enter the password every time you restart your Mac or connect the external hard drive.

2. Encrypt an External Hard Drive on Mac Without Erasing

As the hard drive formatting will lead to data loss, you can take another way to encrypt your external hard drive without erasing it.

Step 1. Connect the external hard drive to your Mac.

Step 2. Open the Finder window. Locate and right-click the external disk, then select "Encrypt (drive name)" from the drop-down menu.

encrypt USB on mac

Step 3. Enter and confirm the password at the pop-up dialogue box. You can also add a hint to help remember the password later. 

Step 4. Select "Encrypt Disk" to start encrypting the external hard disk. Depending on the size of the file, it can take a lot of time.


These are two ways to password protect an external hard drive in Windows 10. You can use EaseUS LockMyFile to lock and put a password to your external hard drive without encryption. With this software, it’s not rocket science to protect your computer, external hard drive, and USB flash drive.

For users who don't like to use a third-party tool, you can use BitLocker to encrypt your whole external hard drive. This article also shows you two ways to password protect an external hard drive on Mac with or without erasing. Choose the one that works best for you.