I have a Bitlocker encrypted external HDD. I plugged it to pc with usb then i unlocked my drive on Win10 with my password as usual then i was copying the data from my unlocked Bitlocker encrypted drive to another non-encrypted drive. Then power cut suddenly. After that i cannot access my Bitlocker encrypted drive anymore. When I try to unlock that drive from Windows Explorer pop-up says "Bitlocker drive encryption on this drive is not compatible with your Windows. Try to unlock it with newer version of Windows." without password and recovery key input options. I also tried repair-bde without success.
There are several solutions to solve 'Cannot unlock/repair Bitlocker encrypted drive'.
Solution 1: Check connection
We suggest you remove Bitlocker encrypted drive from the computer, then re-attach the drive on a different port.
Solution 2: Update BIOS
Contact to the manufacturer and check for the latest updates available for the BIOS.
Solution 3: Try another Windows
If Bitlocker drive is encrypted on Windows 7/8, this Bitlocker encrypted drive cannot be read on Windows 10 as Windows 10 uses XTS-AES encryption algorithms and old Windows uses AES encryption algorithms, you need to try it on another Windows 7/8 computer.
If Bitlocker drive is encrypted on Windows 10 and chose 'New encryption mode', this Bitlocker encrypted drive cannot read on Windows 7/8 as new XTS-AES encryption algorithm is compatible with old Windows version, you need to try it on another Windows 10 computer.
Solution 4: Bitlocker data recovery
M3 Bitlocker Recovery is a professional Bitlocker data recovery software which can recover data from formatted, corrupted, inaccessible, failed Bitlocker encrypted drive, recover data after Bitlocker encryption/decryption stuck, interrupted, hung, failed, suspended, frozen as long as you have the password or 48-digit recovery key. M3 Bitlocker Recovery supports both AES and XTS-AES encryption algorithms.
Tutorial to recover data from Bitlocker encrypted drive with M3 Bitlocker Recovery
Step 1: Download, install and launch M3 Bitlocker Recovery on your computer.
Step 2: Select the inaccessible Bitlocker encrypted drive and then click Next to continue.