OneDrive File Issues

How to Recover Files Locked in a OneDrive Personal Vault Folder

Huma Ashraf Ch Oct 9, 2026 870 views

Question details

The user needs to recover unsynchronized files that were moved to a temporary folder during a OneDrive Personal Vault sync issue, which is now unexpectedly requesting a BitLocker recovery key.

How to Recover Files Locked in a OneDrive Personal Vault Folder

Product: Microsoft OneDrive
Device & OS: not provided
Scenario: The system drive became full during OneDrive Personal Vault synchronization, causing files to be moved to a temporary folder on another drive.
Observed behavior: The temporary folder containing 50 GB of unsynchronized files is now locked and requesting a BitLocker recovery key that the user did not manually create.

Before you start

Do not format or delete the temporary folder containing your unsynchronized files, and ensure you have access to the Microsoft account linked to your Windows device.

Solution 1Recommended

Retrieve the BitLocker Recovery Key from Your Microsoft Account

Since Windows is requesting a BitLocker key for the temporary drive, you must retrieve the automatically generated key from your Microsoft account.

OneDrive Personal Vault normally uses identity verification rather than a user-managed BitLocker key. However, if files were moved to a separate drive that Windows automatically encrypted, you will need the BitLocker recovery key to access them.

Visit the Microsoft Recovery Page

Open a web browser on a working device and navigate to the official Microsoft account recovery-key page (account.microsoft.com/devices/recoverykey).

Sign In to Your Account

Locate the Recovery Key

Find the 48-digit BitLocker recovery key that matches the Key ID displayed on your locked drive's prompt.

Unlock the Drive

Enter the 48-digit recovery key into the Windows BitLocker prompt to unlock the temporary folder and access your files.

Retrieve the BitLocker Recovery Key from Your Microsoft Account

Contacting Microsoft Support: If the recovery key is not available in your Microsoft account, you will need to contact Microsoft Support directly, as there is no way to bypass BitLocker encryption without it.

Solution 2

Unlock via Standard Personal Vault Identity Verification

Use this method if the files are still within the standard OneDrive Personal Vault interface rather than an external BitLocker-encrypted drive.

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Frequently Asked Questions

Why did OneDrive create a BitLocker key I didn't authorize?

OneDrive Personal Vault uses BitLocker technology in the background to secure your files. If files are unexpectedly moved to a different drive due to low storage, Windows may enforce device encryption automatically, saving the key to your Microsoft account.

Can I format the temporary folder to remove the BitLocker prompt?

No. Formatting or deleting the temporary folder will permanently erase the unsynchronized files stored inside it. You must unlock it using the recovery key to retrieve your data.

What happens if I cannot find my BitLocker recovery key?

If the key is not in your Microsoft account or Azure Active Directory, the encrypted data cannot be recovered. You must contact Microsoft Support to see if alternative recovery options exist for your account.

Document & File Issues