To change the passphrase of your Persistent Storage:

  1. Choose Applications ▸ Tails ▸ Persistent Storage to open the Persistent Storage settings.

  2. Click on the Change Passphrase button in the left of the title bar.

  3. Enter the current passphrase in the Current Passphrase text box.

  4. Enter your new passphrase in the New Passphrase text box.

    It is impossible to recover your passphrase if you forget it!

    To help you remember your passphrase, you can write it on a piece of paper, store it in your wallet during a few days, and destroy it once you know it well.

  5. Enter your new passphrase again in the Confirm New Passphrase text box.

  6. Click Change.

You can now restart Tails and try to unlock the Persistent Storage with the new passphrase.