@Hakan Hümmet
Hi,
The following information may help you locate your recovery key:
https://support.microsoft.com/en-us/windows/finding-your-bitlocker-recovery-key-in-windows-10-6b71ad27-0b89-ea08-f143-056f5ab347d6
If the recovery key is lost, the drive cannot be unlocked by other means.
Hope above information can help you.
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