This technique is fast but might not prevent a strong attacker from recovering files from the old persistent volume using advanced data recovery techniques.

To securely delete the persistent volume, you have to securely delete the entire USB stick, which is a much slower operation.

  1. Start Tails from the USB stick on which you want to delete the persistent volume.

    Do not enable the persistent volume in Tails Greeter.

  2. Choose Applications ▸ Tails ▸ Delete persistent volume.

  3. Click Delete.