**Operating systems do not actually remove the contents of a file when ithe file is deleted**, even after emptying the trash or explicitlyremoving the file, from the command linefor example. .
Operating systems do not actually remove the content of a file when the file is deleted, even after emptying the trash or removing the file from the command line.
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A new device appears in the list of storagedevices. Click on it:.
A new device appears in the list of devices. Click on it.
44
Click on the <span class="guimenu">[[!img lib/pan-downview-more.png alt="menu toggleDrive Options" class="symbolic" link="no"]]</span> button in the title bar and choose <span class="guilabel">Show Hidden Files</span>**Format Disk**.
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.
Choose **Overwrite existing data with zeroes (Slow)** in the **Erase** menu.
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Choose <span class="guilabel">**Compatible with all systems and devices (MBR/DOS)</span>** in the <span class="guilabel">Partitioning</span> drop-down list**Partitioning** menu.
