How to Enforce BitLocker Encryption on Removable Drives

What is BitLocker Encryption on Removable Drives?

BitLocker encryption for removable drives stops others from reading your files if your USB stick or external hard drive gets lost or stolen. BitLocker scrambles your data, making it unreadable without a password or key. (Scrambling means it’s effectively turned into a secret code.) You can choose to scramble everything, including empty space, for the highest security, or just scramble where files are saved to make encryption faster.

• Full Encryption: Encrypts the entire drive, even the empty space. This takes longer but is very secure.
• Used Space Only Encryption: Encrypts only the parts of the drive where you have saved files. This is faster but encrypts less data.

By default, Windows will ask which encryption type you want when you first set up BitLocker for a removable drive.

How to Enforce One Encryption Type Using Group Policy

You can force BitLocker to always use a specific encryption type for removable drives by changing a setting in the Group Policy Editor. This tool lets you set a rule so everyone using the computer must use your chosen encryption method, like always using full encryption or only encrypting used space. This policy ensures your security settings remain consistent across all devices.

1. Press the ⊞ Start button, type Edit group policy, and open the Local Group Policy Editor.
2. Go to this folder path: Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Removable Data Drives
3. On the right side, double-click Enforce drive encryption type on removable data drives.
4. Choose one of these options:

   • Not Configured (or Disabled): Windows will ask you which encryption type to use every time.
   • Enabled: You pick one encryption type below, and Windows will not ask users anymore.
5. Select Full encryption to always encrypt the whole drive.
6. Select Used space only encryption to encrypt only the used space.
7. Disabled: Same as Not Configured; user chooses encryption type.
8. Click OK to save.
9. 🔄 Restart your PC to apply the change.

How to Enforce Encryption Type Using the Windows Registry

You can also force a specific BitLocker encryption type on removable drives by using the Windows Registry Editor. This is another way to tell Windows exactly how to encrypt your USB drives and external hard drives, making sure everyone uses the encryption method you prefer. Administrator access is required to make these changes.

1. ⚠️ Admin privileges required: ⊞ Press Start, type regedit, and open the Registry Editor (run as administrator).
2. Navigate to this key: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE
3. Look for a value named RDVEncryptionType. If it doesn’t exist, create it:

   • Right-click in the right pane → New → DWORD (32-bit) Value
   • Name it RDVEncryptionType
4. Double-click RDVEncryptionType and set its value data to:

   • 1 to enforce Full encryption
   • 2 to enforce Used space only encryption
5. Click OK and close the Registry Editor.
6. 🔄 Restart your computer to apply the change.

Summary

• BitLocker protects your data on removable drives by encrypting it.
• You can choose between full encryption or encrypting only used space.
• You can force a specific encryption type so users won’t be asked every time by using Group Policy or the Registry Editor.
• These steps help keep your data safer with the encryption method you prefer.

BitLocker encryption protects your data on removable drives by scrambling files so only you can read them. You can choose to encrypt all files or just the files saved on the drive. To ensure consistent security settings across multiple computers, you can use Group Policy or the Registry Editor to force a specific encryption type for all removable drives.