How to ensure a permanently delete (shift + delete) file has been deleted and is not recoverable with advanced software

Hi experts, I cleaned my harddrive using shift delete but also normal deletion and then empty the trash. I do so I can prepare to be sold on if I find a moment (and buyer).

I am told however that this actually does not remove the files but brand only as "too accessible writing." And that it takes a while - depending on how much has been marked to be deleted permanently - for these files too write.

How can I make sure all the files I want to permanently delete are not recoverable with advanced software?

How long would it take to write too say 20 GB of data?

Your feedback is very much appreciated.

Rgds,

WV

Use Google or Bing to search for 'file shredder' or 'secure erase' software which will overwrite files with random patterns of data, making them unrecoverable by most of the efforts.  HOWEVER, please keep in mind that no matter what you do, away from physically destroy the hard drive, there are always ways to recover files even if these files have disappeared in a secure way.  That's why U.S. Federal agencies requiring a high security have their hard drives shredded into metal fragments when they have access to computers.

Tags: Windows

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