Selling external hard drive on Craigslist - security question.

Hello

I have some external 2.5 and 3.5 form factor hard drives. I have reformatted every drive and everything is erased. I understand someone can go in and use software to retrieve the deleted files.
My question is how do I make the drives secure before selling them? Any suggestions would be appreciated.

Thanks.
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  1. Apple computers have a cool feature where it can erase your hard drive numerous times to ensure data is gone forever. After so many deletions, there's barely a chance that the disks can retain any old information.

    You really can't be too certain, unfortunately. I would say do several low-level formats just to be sure.
  2. http://www.killdisk.com/

    Could also download and run this.
  3. Okay thanks.
  4. xlome said:
    Hello

    I have some external 2.5 and 3.5 form factor hard drives. I have reformatted every drive and everything is erased. I understand someone can go in and use software to retrieve the deleted files.
    My question is how do I make the drives secure before selling them? Any suggestions would be appreciated.

    Thanks.

    I looked up secure wipe on the net and ran across this web site where you can download a program called Darik's Boot And Nuke, here is the site web address:
    http://www.dban.org/.
    There is also some good information about wiping hard drives on this web site.
    http://www.zdnet.com/blog/storage/how-to-really-erase-a-hard-drive/129
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