How To Permanently Delete Files?

November 3, 2018

Ashley on Train Tracks

To permanently delete a file it is not enough to press delete or to empty the recycle bin. Operating systems like Windows or Mac OS delete the file by marking it invisible and by releasing the disk space it was using. In fact, it is impossible to delete the file, you can only overwrite it with some other data. This basic principle of computer file system is used to undelete files. If we have, for example, accidentally deleted some file, we can recover it by using some undelete tool. If the data was not overwritten we can get the original file back as it was prior to deletion.

For many computer users this behavior of files is not problematic. We don’t care what happens with the files after they are deleted. But there are cases when we care or at least we should care. When we would like to dump the old computer or donate it to somebody we don’t want to leave all the files on the disk. Deleting them or even formatting the disk does not solve the problem. With simple recovery tools it is possible to recover formatted partitions and deleted files. This is a problem because our files may contain confidential data, user names, passwords or personal data.

This is even a greater problem for companies. They can not simply give away old computers containing sensitive documents with confidential data. Formatting the disk, of course, hides files only from amateurs. Therefore, some way to erase the data has to be found. And it was. All you have to do is to overwrite the disk with random or nonsense data. This data overwriting will prevent conventional data recovery methods. Only conventional because there are also unconventional or exotic methods that can examine the hard drive platters under electronic microscope to recover even overwritten data.

To erase a hard drive you can use one of many hard drive erasers. This is a software tool that overwrites selected files with predefined data patterns to prevent data recovery. To be on a safe side one pass is not enough. Most disk wiping algorithms approved by authorities use multiple overwriting passes to remove all traces of the original disk data.

Even if you intend to dump your old computer it is a good idea to permanently delete all the data stored on the hard drive. You never know who might be interested in recovering the files from an old computer. Some do it for fun, others for business.

28 Comments

  • Thusi Bro November 3, 2018 at 9:27 pm

    සබ්ස්ක්‍රයිබ් බටන් එක ඔබන්න තවත් මේ වගේ විඩියෝ දැන ගන්න

  • Apm Priyanthi November 3, 2018 at 9:27 pm

    Thank you so much

  • Nishani Samanthika November 3, 2018 at 9:27 pm

    Malli imo photo album eke photos okkoma eka para delete karana heti kiyannako…

  • N geek 1 frust November 3, 2018 at 9:27 pm

    imo delete una acount eka ganna widhiha kohoma hariiiiiiii video ekak

  • Kandy Rose November 3, 2018 at 9:27 pm

    mama inne dubai wala.imo calls ganna ba dan lankawata maseka witara idala.vpn on karalath ganna amarui.ane kawuru hari danna kenek innwanan help ekak dennako

  • Renu nilusha nilusha November 3, 2018 at 9:27 pm

    Delete karapu mg ganna vidiya kuth hoyala kiyanna

  • chathu dinuka November 3, 2018 at 9:27 pm

    Mg ganna narida bn

  • Chami Dinesh November 3, 2018 at 9:27 pm

    විඩියෝ එක හොදයි සාර්ථකයි හරිම සන්තෝසයි ඔයාගෙ උත්සහය ගැන ගොඩක් අයට වැදගත්. අඩු පාඩු මුලුත්ම නැ මල්ලියො ඉතාමත් සාර්ථකයි. බුදු සරණයි ජය වේවා.👌👌👌👌👌👌👌👍👍👍👍👍

  • Komary 21 November 3, 2018 at 9:27 pm

    Godak ස්තුතිය

  • Shashi Anuradha November 3, 2018 at 9:27 pm

    Godak hodai videyo eka thanks oyata

  • Umesh isuru November 3, 2018 at 9:27 pm

    Fatta

  • Kumara Kumara November 3, 2018 at 9:27 pm

    Cant instal app watenawa play store ake me gena poddak kiynnko

  • Sandeep lakshan November 3, 2018 at 9:27 pm

    Malli Me List eke cantac list eka Delete karanna Barida 😞😞😞

  • thenkz Dileepa November 3, 2018 at 9:27 pm

    thenkz bro

  • Sadun Nishan November 3, 2018 at 9:27 pm

    Niyamai broo

  • Sadun Nishan November 3, 2018 at 9:27 pm

    Niyamai broo

  • Ashik Zamaan November 3, 2018 at 9:27 pm

    Thanks malli

  • Scs Senavi Rathna November 3, 2018 at 9:27 pm

    eth hama contact ekakma ennane apata ona karana nama ganne kohomada

  • Nilanthi Dilhani November 3, 2018 at 9:27 pm

    මල්ලි මගෙ අතින් ඉමො එක ඩිලට් වුනා ඩයලොක් සිම් එකට තමා ඉමො හදල තිබ්බෙ දැන් එ නොමිබරෙන් ඉමො ඔාන් කරන්න කොට් නොමිබරයක් ඉල්ලනවා ඉතින් මම දන්නෙ නැ කොට් නොමිබරය කොහොමද ඉමො ඔාන් කරන්නේ

  • Piyanka Muthumunikipu November 3, 2018 at 9:27 pm

    අයියෙ මට දැනගන්න ඕනෙ කමිනිකේෂන් එකට යන්නෙ නැතුව ෆෝන් එක සොෆ්ට් වෙයාර් කරන්න පුලුවන්ද කියල පුලුවන්නම් ඒගැන මට කියල දෙන්න අයියෙ අනිත් එක තමයි ඊමෝ වලින් කව්රු හරි මාව බ්ලොක් දැම්මොත් ඒ බ්ලොක් එක මට අයින් කරන්න පුලුවන්ද කියල (මගෙ ෆොන් එක හුවාවි) පුලුවන්නම් මේ නම්බර් එකට මැසේජ් එකක් දාන්න අයියෙ මම ඉන්නෙ ඕමාන් 968-98485103

  • Sureaka Nimanthi November 3, 2018 at 9:27 pm

    mage pon eke monawathma daunlod wenne na mage yaluwage pon ekata ena call ahanna hada ganne kohomada

  • Sheika Sheikh November 3, 2018 at 9:27 pm

    ඔබට ස්තූතියි

  • Kalum Prasantha November 3, 2018 at 9:27 pm

    Hidden karapu photo video delete unama hari.passworld eka nathi wela unstall karama nathi unu photo ganna widiyak nadda

  • Sdaruwan Udaya Kumara November 3, 2018 at 9:27 pm

    ft bvn

  • Vissandara Araccige Ajith Priyantha November 3, 2018 at 9:27 pm

    Thanks male

  • හිරු සදු මගෙ පන November 3, 2018 at 9:27 pm

    බොහොම පැහැදිලියි .ඔබට ස්තුති

  • Dulakshi Sawumya November 3, 2018 at 9:27 pm

    aiye apita me wage nodanna de kiya dunnata thanks.

  • kelum srinath November 3, 2018 at 9:27 pm

    hodai el

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