How To Permanently Delete Files?

November 8, 2018

Glowing Poppies

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.

25 Comments

  • Miss Gsm November 8, 2018 at 5:01 pm

    I am having that same problem, going there now to empty mine. Thanks!

  • Olympiano Exposes November 8, 2018 at 5:01 pm

    1:34 you're singing

  • Beanie Boo Tot Tot November 8, 2018 at 5:01 pm

    I have the same phone and it only costed like 30 dollars or something,in not kidding,its what everybody said in my family,so it must be true

  • Josh Adams November 8, 2018 at 5:01 pm

    Fuck Metro. Go cricket

  • Dreammuth Aphol November 8, 2018 at 5:01 pm

    Man, i delete apps for another and theres LESS space. HOW?

  • Michaela Hoffman November 8, 2018 at 5:01 pm

    Thanks!

  • Nik Muhammad November 8, 2018 at 5:01 pm

    I reset my device couple time because the device want to turn into šŸŒ

  • oolongT November 8, 2018 at 5:01 pm

    i cant see com.android.gallery3d folder even though clicked show hidden files

  • Jose Cruz November 8, 2018 at 5:01 pm

    for 180 you could get an iphone

  • lightning bolt November 8, 2018 at 5:01 pm

    those cleaning apps makes your phone slower

  • MirrorMaster900 November 8, 2018 at 5:01 pm

    1

  • Rias Gremory November 8, 2018 at 5:01 pm

    Ohk that was old trick I found long enough but still it's nice way to clear up space

  • Alsaud Manalao November 8, 2018 at 5:01 pm

    How to delete Other in storage?

  • Nasir Mir November 8, 2018 at 5:01 pm

    you can clear hidden memory in es file explorer too ..

  • bluefire wolf November 8, 2018 at 5:01 pm

    OMH IT WORKED I HIGHLY RECOMMEND THIS WAY

  • Mohamed Ismail November 8, 2018 at 5:01 pm

    Thank you.

  • XAnimation X November 8, 2018 at 5:01 pm

    Can you help me?I can't find the trashcan šŸ˜¢šŸ˜¢šŸ˜¢

  • Jimmy Randomness November 8, 2018 at 5:01 pm

    It's always different per Device and operating system. Nice video tho

  • Basil November 8, 2018 at 5:01 pm

    This is a very useful tip to know, my grandson had the very same problem. His phone was useless as he could not even install app updates. This cured it in a snap. Thank you.

  • Flexzone India November 8, 2018 at 5:01 pm

    redmi cleans it out easily. I have no such folder

  • Josh Leshan kereto November 8, 2018 at 5:01 pm

    I searched for this video again,just to say it worked so well, 3 extra GB. Thank you so much.

  • AlphaMax November 8, 2018 at 5:01 pm

    I need to check this out since I just got the Motorola G6 Play and it is a 16gb internal and is already running out of space. I did format my sd card as internal and moved files over to that and it did free up some space. I use a 32gb sd.

  • living life 4real November 8, 2018 at 5:01 pm

    I did all the things done in the video but it still shows alot in the miscellaneous what am I missing?

  • Nick Brouzes November 8, 2018 at 5:01 pm

    You rock man. This really helped me out!

  • Abdellah B.L November 8, 2018 at 5:01 pm

    Thanks . It works. Disk digger could not find anymore internal data

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