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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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To do so:

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In the **Format Disk** dialog:

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<p>Overwriting existing data does not erase all data on flash
memories, such as USB sticks and SSDs (Solid-State Drives).</p>

<p>See the [[limitations of file deletion|doc/encryption_and_privacy/secure_deletion#spare]].</p>

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Choose **Compatible with all systems and devices (MBR/DOS)** in the **Partitioning** menu.

Click **Format**.

In the confirmation dialog, make sure that the device is correct.