Key Derivation Failed - Possibly Wrong | Passphrase _best_

Occasionally, a major update to encryption software changes the default KDF parameters. If you created the volume years ago, try opening it with an older version of the software. Step 3: Dealing with Header Corruption

Before assuming your data is corrupted, you must rule out the simplest explanation: the input. key derivation failed - possibly wrong passphrase

Before assuming the data is gone, rule out the simplest physical mistakes. Occasionally, a major update to encryption software changes