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[[!meta title="Securely deleting files and clean diskspace"]]
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[[!meta title="Securely deleting files"]]
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[[!toc levels=12]]
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[[!toc levels=2]]
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Why use secur<h1 id="risks">Limitations of file deletion?</h1>
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<h1 id="risks">Limitations of file deletion</h1>
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<p class="quoted-from">Quoted from [[!wikipedia Secure_file_deletion
See also [[!wikipedia Data_erasure desc="Wikipedia: %s"]].</p>
Data Erasure"]].
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See also [[!wikipedia Data_erasure desc="Wikipedia: Data Erasure"]].
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**Operating systems do not actually remove the contents of a file when ithe file is
 deleted**, even after emptying the trash or explicitly removing the file, from
 the command line for example.
.
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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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<div class="noteattack">
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<div class="attack">
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Securely delete<h2 id="tails">Use Tails to avoid saving files</h2>
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<h2 id="tails">Use Tails to avoid saving files</h2>
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<h2 id="encrypt">Encrypt your storage devices</h2>
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<h2 id="overwrite">Overwrite the entire device</h2>
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Plug in the USB stick or SSDdevice that you want to securely delereformat and overwrite.
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Plug in the device that you want to reformat and overwrite.
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A new device appears in the list of storage devices. Click on it:.
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A new device appears in the list of devices. Click on it.
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Check that the descriptionbrand and size of the device oin the right side of the screenpane corresponds to your device: its brand, its size, etc.
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Check that the brand and size of the device in the right pane corresponds to your device.
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Click on the <span class="guimenu">[[!img lib/pan-downview-more.png alt="menu toggleDrive Options" class="symbolic" link="no"]]</span> button in the right corner of the title bar and choose <span class="guilabel">Show Hidden Files</span>**Format Disk**.
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Click on the [[!img lib/view-more.png alt="Drive Options" class="symbolic" link="no"]] button in the title bar and choose **Format Disk**.
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In the <span class="guilabel">**Format Disk</span>** dialog:
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In the **Format Disk** dialog:
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Choose to <span class="guilabel">**Overwrite existing data with zeroes</span> in the <span class="guilabel">Erase</span> drop-down list (Slow)** in the **Erase** menu.
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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.
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Choose **Compatible with all systems and devices (MBR/DOS)** in the **Partitioning** menu.
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In the confirmation dialog, make sure that the device is correct. Click <span class="bold">Format</span> to confirm.
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In the confirmation dialog, make sure that the device is correct.
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