Choose <span class="guilabel">Compatible with all systems and devices (MBR/DOS)</span> in the <span class="guilabel">Partitioning</span> drop-down list**Overwrite existing data with zeroes (Slow)** in the **Erase** menu.
For top secret documents, the National Security Agency ([[!wikipedia NSA]]) of the USA recommends disintegration into particles of 2 mm. This can be achieved using a [good quality household blender](https://commons.erau.edu/jdfsl/vol16/iss2/1/).