Does BitLocker encrypt the whole drive?
Yes, BitLocker can encrypt an entire drive, but the result depends on whether you choose Encrypt Used Disk Space Only or Encrypt Entire Drive.
Used Space Only is faster and encrypts data currently stored on the drive, while Full Drive Encryption also protects unused space.
This guide explains the difference between the two options and how to enable BitLocker encryption.
How the Two Options Work
BitLocker offers two encryption options. The main difference is how much of the drive is encrypted during the initial encryption process.
| Encryption option | What it encrypts | Speed | Best for |
| Encrypt Used Disk Space Only | Currently used space | Faster | New PCs or drives |
| Encrypt Entire Drive | Used and unused space | Slower | Previously used drives |
Encrypt Used Disk Space Only
“BitLocker used space only” is a BitLocker option in Windows that encrypts only the data currently stored on the drive, while leaving unused space unencrypted.
Because it processes less data, the initial encryption is much faster and can often be completed in minutes rather than hours.
Here’s a quick look at the advantages and drawbacks.
- Faster setup: It reduces the time needed to complete the initial encryption.
- Ideal for new drives: For a brand-new PC or empty drive, it provides adequate protection because there is no previously stored data to recover.
- Potential risk on used drives: If the drive previously contained deleted personal or sensitive files, remnants of that data may still be recoverable using specialized recovery tools.
- Key dependency: Forgetting your password or losing your recovery key could result in permanent loss of access to your data.
Encrypt Entire Drive
BitLocker full disk encryption, also known as full disk encryption (FDE), encrypts all data on a drive, including system files, personal files, and unused space.
Although it takes longer, it offers stronger protection for previously used drives, especially those containing sensitive data.
The following are its advantages and risks.
- Theft protection: Keeps your files unreadable if your laptop or drive is lost or stolen.
- Secure disposal: Helps prevent sensitive data from being recovered from retired or discarded drives.
- Key dependency: Losing your password or recovery key can permanently lock you out of your data.
Now that you understand how the two BitLocker encryption options work, let’s see how to enable BitLocker and choose the appropriate encryption option for your drive.
How to Enable BitLocker Encryption
If you want to protect the data on your Windows drive, you can enable BitLocker using Windows’ built-in tools or a third-party disk management tool.
Here are two common methods.
Method 1: Via MiniTool Partition Wizard
If you prefer a simpler way to manage drive encryption, you can use MiniTool Partition Wizard. It provides an alternative solution for encrypting and managing your drives.
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Step 1: Open MiniTool Partition Wizard.
Step 2: Right-click the drive you want to encrypt and select BitLocker Manager.
Step 3: In the pop-up window, click Turn on BitLocker.
Step 4: Select an unlock method, set your password, and click Next.
Step 5: Select where you want to save the recovery key. In this example, choose Save to a file.
Step 6: Select a location to save the recovery key and click Save. Then click Next.
Step 7: Select how much of the drive you want to encrypt, then click Next.
- Encrypt used disk space only: Encrypts only the space currently occupied by data. This option is recommended for new or freshly formatted drives.
- Encrypt entire drive: Encrypts the entire drive, including existing data and potentially recoverable deleted data. This option is best for drives that have already been used.
Step 8: Choose your preferred encryption mode, then click Next.
Step 9: Click Start encrypting to begin the encryption process.
Method 2: Via Control Panel
You can enable BitLocker directly through Control Panel:
- Open Control Panel and go to System and Security.
- Click BitLocker Drive Encryption.
- Select the drive you want to encrypt and click Turn on BitLocker.
- Follow the on-screen instructions to set up BitLocker and save your recovery key.
- Click Start encrypting and wait for it to complete.
Does BitLocker Encrypt the Entire Drive FAQ
The numbers 128 and 256 indicate the length of the encryption key, which is 128 bits and 256 bits, respectively. A 256-bit key is longer and provides a higher level of security.
Bottom Line
BitLocker can encrypt an entire drive, but the coverage depends on the encryption option you choose. Encrypt used disk space only protects the space currently in use, while Encrypt entire drive secures the whole volume.
If you have any questions or feedback about MiniTool Partition Wizard, feel free to contact our support team at [email protected] for additional help.
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