Bitlocker drive won't unlock with correct password or Bitlocker recovery key

I have an external hard drive encrypted by Bitlocker, and works fine until I reinstalled the OS one day. I am petty sure the password is correct, but always give me error: The password you entered is incorrect. I was trying to use my recovery key, but always says: The Key doesn't match this drive. How should I unlock this Bitlocker encrypted external hard drive?

There are two solutions to solve 'Bitlocker drive won't unlock with correct password or Bitlocker recovery key' problem.

Solution 1: Change a computer and have a try

Step 1: Connect this Bitlocker encrypted external hard drive to another Windows computer where installed Windows 7 Enterprise, Windows 8 Professional/Enterprise or Windows 10 Professional/Enterprise.

Step 2: Double click Bitlocker encrypted external hard drive and then Enter the password or Bitlocker recovery key.

If Bitlocker drive won't unlock with correct password or Bitlocker recovery key, please go to solution 2 to recover data from corrupted Bitlocker encrypted drive.

Solution 2: Bitlocker data recovery

Unlike common data recovery, Bitlocker data recovery requires intact Bitlocker metadata and password or Bitlocker recovery key to decrypt data from Bitlocker encrypted drive so that lost data can be recovered properly.

M3 Bitlocker Recovery is a professional Bitlocker data recovery software which can recover data from formatted, corrupted, failed, inaccessible, unknown, deleted or lost Bitlocker encrypted partition, recover data after Bitlocker failure, recover data after Bitlocker error, recover data after Bitlocker drive encryption failed, interrupted, froze, hung, recover data after Bitlocker drive decryption failed, interrupted, froze, hung as long as we provide the correct password or 48d-digit recovery key.

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Recover data from corrupted Bitlocker encrypted drive with M3 Bitlocker Recovery

Step 1: Download, install and launch M3 Bitlocker Recovery on your computer.

Step 2: Select the corrupted Bitlocker encrypted drive and click Next to continue.

Step 3: Enter the password or 48-digit Bitlocker recovery key.

Tips: If M3 Bitlocker Recovery doesn't accept correct password or 48-digit Bitlocker recovery key, it means Bitlocker metadata has been completely erased so that there is no way to unlock Bitlocker encrypted drive or decrypt data from Bitlocker encrypted drive.

Step 4: Scan the lost data from corrupted Bitlocker encrypted drive.

Step 5: After the lost data is found, please select them and click "Recover" to save.