User's Manual

Additional tools
108
Select Deletion Method
This section deals with the level of security you wish to use when deleting files or folders.
Just select one of the three options in the Deletion method section.
Quick delete: The files will be overwritten with a single character. The files no longer
contain the original text, but endless columns of a single letter.
Secure delete in accordance with DoD 5220.22-M follows guidelines issued by the US
Department of Defense (DoD 5220.22-M). The files are overwritten with special data
patterns multiple times before deletion, thereby destroying the original contents so
effectively that even expensive examinations of the magnetic structure of the disk in a
special laboratory cannot recover the data.
Gutmann secure deletion : This method, named after its inventor Peter Gutmann,
overwrites the files to be deleted in 35 passes with random values in a special pattern and
then deletes them. This method is considered the most secure way to delete files with
software, but also takes the longest time.
You can specify how many times the deletion process should be performed under Repeat
the delete operation.
Click
The more the process is repeated, the more secure the deletion
will be, and the longer the process will take.
Next to begin the deletion process. Please wait until this is successfully completed. If
you do not want to delete any more files, you can close the wizard by clicking Finish.
If you wish to delete additional files or folders, simply click Back.
Shredding a File After Deletion
If you have already deleted an important file by “normal” means, the only way to reliably
destroy it is by using a special tool that overwrites all free space on your drives.
Tip:
When you defragment a drive, any deleted files are normally overwritten in the
process and cannot be recovered afterwards.
How securely do
you want to delete
your files?
How many times
should the deletion
operation be
repeated?