How to encrypt and password‑protect external backup drives on Windows

Summary

This guide helps you troubleshoot and resolve: How to encrypt and password‑protect external backup drives on Windows. Follow the steps below to fix the issue.

Common Causes

External backup drives are a convenient way to protect your business data, but they can become a liability if lost or stolen. By enabling BitLocker encryption and setting a strong password, you ensure that only authorised users can access the contents of the drive. This guide walks you through the process for Windows 10 and Windows 11.

Quick Fix Steps

1. Connect the external drive to your PC.
2. Open Settings → Update & Security → Device encryption (or Control Panel → BitLocker Drive Encryption).
3. Find your external drive in the list and click Turn on BitLocker.
4. Select Use a password to unlock the drive and enter a strong password.
5. Choose an encryption mode and click Start encrypting.

Detailed Instructions

1. Verify prerequisites

• Windows edition must be Pro, Enterprise or Education. Home editions do not include BitLocker.
• Make sure the drive is formatted with NTFS; BitLocker does not work on FAT32.
• Ensure you have administrative rights on the computer.

2. Open BitLocker management

1. Press Win + X and select Control Panel.
2. Navigate to System and Security → BitLocker Drive Encryption.
3. If you prefer the modern Settings app, go to Settings → Update & Security → Device encryption and click Turn on BitLocker for the external drive.

3. Turn on BitLocker for the external drive

1. Locate the external drive in the BitLocker window and click Turn on BitLocker next to it.
2. When prompted, choose Use a password to unlock the drive.
3. Enter a password that meets the following criteria:
   • At least 8 characters
   • Mix of upper‑case, lower‑case, numbers and symbols
   • Avoid common words or personal information
4. Re‑enter the password to confirm.

4. Save the recovery key

1. Choose how you want to back up the recovery key:
   • Save to Microsoft account – easiest for personal devices.
   • Save to a file – store on a separate USB stick or network location.
   • Print the recovery key – keep a physical copy in a secure place.
2. Click Next after selecting your preferred method.

5. Select encryption options

1. Choose an encryption mode:
   • Encrypt used space only – faster, suitable for new drives.
   • Encrypt entire drive – more thorough, recommended for drives with existing data.
2. Click Next, then Start encrypting.
3. Encryption progress will be displayed; you can continue to use the drive, but avoid removing it until the process completes.

6. Verify encryption status

1. Return to the BitLocker window. The drive should now show BitLocker on with a lock icon.
2. Safely eject the drive and reconnect it to confirm that the password prompt appears.

Troubleshooting

BitLocker option is missing

• Confirm you are running a supported Windows edition (Pro, Enterprise, Education).
• Open gpedit.msc (Local Group Policy Editor) and navigate to Computer Configuration → Administrative Templates → Windows Components → BitLocker Drive Encryption. Ensure the policies are not disabling BitLocker.

Drive does not appear in BitLocker list

• Make sure the drive is formatted with NTFS. Use diskmgmt.msc to check and reformat if necessary.
• Disconnect and reconnect the drive, then refresh the BitLocker window.

Password not accepted

• Check for leading or trailing spaces; passwords are case‑sensitive.
• Ensure the keyboard layout has not changed (e.g., switching between QWERTY and AZERTY).

Encryption stalls or fails

• Verify there is sufficient free space on the drive for temporary files.
• Run chkdsk /f X: (replace X: with your drive letter) to fix file‑system errors.
• If the issue persists, Open a Ticket for further assistance.

Related Articles

• How to backup photos to external drive

Still Having Issues?