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How to password protect a USB stick in less than 5 minutes

Keep your personal information hidden from prying eyes and add an additional layer of security to your external drive
Tom MorganSenior Consumer Writer

With over a decade of experience at Which?, Tom covers everything from tech advice to money-saving tips, and highlights the best deals during major sales events.

A hand inserting a silver USB flash drive into a laptop, with a wooden surface underneath. A detached USB cap is nearby.
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If your USB drive contains sensitive information that you don't want to fall into the wrong hands, it makes sense to protect it with a password. The process only takes a couple of minutes.

By default, your USB drive is very likely password-free, which means anybody with the stick can plug it into their own computer and browse your files. If you store financial information or security details on your USB drive, that could lead to an even bigger problem.

Below, we have step-by-step instructions for both Windows and macOS users. Plus, we share tips on how to create a secure password if you're stuck for ideas.

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What's the best way to secure the files on my USB stick?

'I keep copies of important financial documents on a USB stick. If it were lost or stolen, I'd be concerned about someone viewing the files. Can I add password protection to keep the contents secure?'

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Creating a password for your USB stick

On Windows 10 Pro and 11 Pro

To secure your USB drive on Windows, you can use BitLocker, Microsoft's built-in drive encryption tool. BitLocker is available on Windows 10 Pro and Windows 11 Pro. If you're using a Home edition of Windows and want to password-protect a USB drive, a free third-party tool such as VeraCrypt can help (keep scrolling for more information).

Password-protect your USB drive by following these steps:

  1. Open the Control Panel and select BitLocker Drive Encryption. If you can't see it, switch the Control Panel view to Large icons.
  2. You'll see a list of the drives connected to your PC. Find your USB drive and select Turn on BitLocker.
  3. In the window that opens, select Use a password to unlock the drive and enter a strong, unique password.
  4. You'll then be asked to back up your recovery key. You can save it to your Microsoft account, save it to a file or print a copy. Store it somewhere safe, as you might need it if you forget your password.
  5. Choose whether to encrypt the used disk space only or the entire drive. For most USB drives, encrypting the entire drive offers the greatest protection.
  6. If prompted, select Compatible mode if you plan to use the drive on older Windows PCs.
  7. Select Start Encrypting and wait for the process to complete.
BitLocker screen

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On macOS

If you're looking to password-protect a USB drive on a Mac, note that the drive must be formatted as APFS or Mac OS Extended to use macOS's built-in encryption feature. If you need to reformat the drive, back up any files first, as reformatting will erase its contents.

When you're ready, follow these steps:

  1. Insert your USB drive into your Mac and open Finder.
  2. In the Finder sidebar, right-click the USB drive and select Encrypt [drive name].
  3. Enter a strong, unique password, verify it and add a password hint if you'd like one.
  4. Select Encrypt Disk to begin the encryption process.

Remember to store your password somewhere safe. If you forget it, you may not be able to access the files on the drive.

Disk Utility on Mac

Need a new USB stick? Check out our expert round-up of the best USB sticks.

VeraCrypt (for Windows and macOS)

VeraCrypt is a free, open-source program that lets you use an encrypted USB stick across Windows, Mac and Linux. As Bitlocker isn’t available on Home editions of Windows, VeraCrypt allows you to password-protect an external drive without it.

To use VeraCrypt, follow these steps:

  1. Download and install the right version of VeraCrypt for your operating system from the official VeraCrypt website. 
  2. Insert your USB drive into your PC, open VeraCrypt and choose Create Volume.
  3. Select Encrypt a non-system partition/drive and click Next.
  4. Choose Standard VeraCrypt volume and select your USB drive.
  5. If the drive is new or empty, select Create encrypted volume and format it. If the drive contains data, select Encrypt partition in place.
  6. From here, you're able to choose the encryption type. Unless you want to experiment, we suggest AES or SHA-512.
  7. Choose a strong and unique password, then select Format/Finish.

To use your password-protected drive in VeraCrypt, select a drive and choose Mount – the software will then make your USB drive accessible via File Explorer (the yellow folder you use to find your files in Windows). When you're done, select Dismount.

VeraCrypt

Tips on choosing a password

There's no point in password-protecting your USB stick if the password itself is too easy to guess. If you're looking to create a secure password, remember the following:

  • Don't use personal information – Avoid including your middle name, place of birth or your favourite sports team.
  • Don't re-use passwords – Make the password tied to your USB stick unique.
  • A passphrase is better than a password – It doesn't have to make sense, either – choosing three random words is a decent passphrase.
  • Consider using special characters – For example, you could turn 'umbrella cable kitten' into '&umbrella+Cable!kitten*'.

For more advice on USB security, including popular password manager programs, see our guide on how to create secure passwords.

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