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English Serbian (latin)
<a id="why"></a>
**Operating systems do not actually remove the contents of a file when it is
deleted**, even after emptying the trash or explicitly removing the file, from
the command line for example.
[[!meta title="Securely deleting files and clean diskspace"]]
Why use secure deletion?
Likewise, reformatting, repartitioning or reimaging a system is not always guaranteed to write to every area of the disk, though all will cause the disk to appear empty or, in the case of reimaging, empty except for the files present in the image, to most software.
<a id="usb_and_ssd"></a>
Warning about USB sticks and solid-state disks
The only way to securely delete any data, even a single file, from a USB stick or an SSD (Solid-State Disk) is to [[securely erase the entire device|secure_deletion#erase-device]].
Securely delete files
<p>Securely deleting files does not erase the potential backup copies of
the file (for example LibreOffice creates backup copies that allow
you to recover your work in case LibreOffice stops responding).</p>
Open the <span class="application">Files</span> browser.
Navigate to the folder containing the files that you want to delete.
Select the files that you want to delete with the mouse.
Right-click (on Mac, click with two fingers) on the files and choose <span class="guimenuitem">Wipe</span>.
Confirm.
<a id="clean_disk_space"></a>
Securely clean available disk space
In order to clean up the contents of all files that were previously suppressed but not securely deleted from a disk, it is also possible to securely clean all the free space on the disk.
<p>This method does not work as expected on solid-state disks or USB
sticks.</p>
Click on the disk that you want to clean in the left pane to navigate to the root of this disk.