How to Resize Encrypted Partition Windows 10 [2023 Updated]

Have you ever encrypted your drive to protect your data? Do you know how to resize encrypted partition to get more free space or release some unused space from it? AOMEI Partition Assistant can help you extend or shrink an encrypted partition easily and safely.


By Hedy / Updated on May 12, 2023

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What is encrypted partition?

In face of a more and more complicated working environment, a large number of people are inclined to take measures to protect their data. Luckily, since Windows Vista, Windows has provided users with a good feature named BitLocker which uses TPM (Trusted Platform Module) to protect the data by setting encryption for the entire partition.

That is to say, the encrypted partition is a partition using personal encryption to prevent your confidential files and documents from being accessed or tampered with by unauthorized people. Once a drive has been enabled Bitlocker encryption, chances are that you can't make a further operation on it with Windows 10 Disk Management because DM cannot modify a partition that is in an encrypted state.

Can I resize an encrypted partition Windows?

However, the majority of users report that they have the need to resize BitLocker encrypted partition Windows 10 because they gradually find the encrypted partition does not have enough free space to store more personal data, or there leaves much-unused space that may be wasted. But can you resize a Bitlocker partition? The answer is positive. Although you are unable to resize encrypted partition via Disk Management without decryption, you can still find a safe and easy way to get it done in the latter context. Let's start!

The easiest way to resize encrypted partition - AOMEI Partition Assistant

To reduce or enlarge encrypted partition without decryption in advance, you can resort to a powerful partition manager like AOMEI Partition Assistant Standard. It's a free Windows disk and partition manager for Windows 11/10/8/8.1/7/XP computers. No matter whether you plan to resize the system encrypted drive or data BitLocker partition, this software can always help you get it done effortlessly.

In case of any accidents during the process, you are suggested to clone the encrypted partition in advance to back up your important data. Then follow the step-by-step guide below to learn how to resize encrypted partition Windows 11/10/8/7 with AOMEI Partition Assistant.

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Step 1. Right-click the BitLocker encrypted partition and select "Resize/Move Partition". Then, a window pops out asking you to enter your password to unlock Bitlocker. 

Resize BitLocker partition

Step 2. When the drive is unlocked, you will be led to the "Move and Resize Partition" window. Drag the bar to resize the partition, and click on "OK"  to continue.

☊ Shrink the encrypted partition: Drag the mouse to the left. After shrinking, you will get unallocated space on the right of the Bitlocker partition. Then, you can use it to enlarge other partitions or create a new partition.
☊ Extend the encrypted partition: Drag the mouse to the right. This function only works when there is unallocated space adjacent to the right of the encrypted partition. To resize encrypted partition with ease, you can decrypt it and then use the "Merge Partitions" or "Allocate Free Space" features.

Drag to resize

Step 3. Click "Yes" to move on if you have no problem with the note.

Extend BitLocker partition

Step 4. Click "Apply" and "Proceed" to confirm the operation.


How do I resize an encrypted drive within Windows?

If you don't want to download a third-party disk manager, you can decrypt the Bitlocker drive in the first place and then use Disk Management to resize it. Here are the detailed steps.

▶ Section 1. Unlock encrypted partition

Step 1. Press "Windows + I" to open Windows Settings, type "encryption" and click "Manage BitLocker" to enter the management interface.


Step 2. In "BitLocker Drive Encryption" window, you will see the situations of all of your hard drive. Choose the one you want to decrypt, and click "Turn off BitLocker".


Step 3. Then you will be noted that this operation might take a long time, click it to start unlocking.


▶ Section 2. Resize encrypted partition

After unlocking, the encrypted drive can be accessed normally. Right-click the window icon and select Disk Management to open it and start to resize encrypted partition Windows 10.

Part one. Shrink Partition

Step 1. Right-click the encrypted partition, and select "Shrink Volume" in the extended menu.


Step 2. Follow the prompts to finish the size reduction of the partition.

Part two. Extend Partition

Step 1. Right-click the encrypted partition, and select "Extend Volume" in the extended menu.


Step 2. Follow the prompts to finish the size increase of the partition.

Make sure there must be unallocated space right behind the target partition you're going to extend, otherwise, the "Extend Volume" will be greyed out.
After enlarging or reducing the encrypted partition, don't forget to encrypt it again to protect your data on it as you have unlocked it before operations.


Can I resize an encrypted partition Windows? The answer is absolutely yes! In this passage, you have learned the meaning of encrypted partition and see how easy it is to resize encrypted partition with the help of AOMEI Partition Assistant Standard. If you upgrade to the Professional edition to enjoy a complete range of partitioning features that help optimize your hard drive for greater computer performance: Clone an entire disk to another even if the target partition is smaller than the source,  migrate OS to SSD to speed up Windows without reinstalling, move apps/files from C drive to D drive for more space, etc.

Hedy · Staff Editor
Hedy is an editor of AOMEI Technology. She is very good at solving problems of partition management, and she wants to share all the problems she had already solved to users who met the same questions.