Best way to Safely Delete Hard Drive for Sale.

Discussion in 'Mac Accessories' started by Traverse, Mar 8, 2014.

  1. Traverse macrumors 603

    Traverse

    Joined:
    Mar 11, 2013
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    Here
    #1
    Hi,

    I have an external hard drive that I no longer need and I can get fifty dollars for it. I used it for time Machine backups and I "restored" it so it has like 499 GB free (I just used the quickest setting in Disk utility), but I wan't to make sure the drive is clear and my information is safe.

    What is the best way to complete clear a HDD?
     
  2. PicnicTutorials macrumors 6502a

    PicnicTutorials

    Joined:
    Dec 29, 2013
    #2
    reFormatting it would safe delete everything right
     
  3. ColdCase macrumors 68030

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    Feb 10, 2008
    Location:
    NH
    #3
    You use disk utility to erase, under security options is a slider to select how secure to erase, from none to write over 7 times. If its a friend, just a reformat may be good enough.

    Then reformat.
     
  4. Traverse thread starter macrumors 603

    Traverse

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    #4
    Thanks, that's what I figured, do you feel that 7 is necessary?
     
  5. PicnicTutorials macrumors 6502a

    PicnicTutorials

    Joined:
    Dec 29, 2013
    #5
    Depends what you got on there :) Better safe than sorry. If it's worth doing it's worth doing right. I got lots more lol
     
  6. ColdCase macrumors 68030

    Joined:
    Feb 10, 2008
    Location:
    NH
    #6
    Depends on how well you know the person you are selling to and how valuable the data is. Overwrite once or twice should be good for typical data.
     
  7. Traverse thread starter macrumors 603

    Traverse

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    #7
    I don't know the person, so I'll probably use the max. Thanks!
     
  8. Alrescha macrumors 68020

    Joined:
    Jan 1, 2008
    #8
    No-one with the ability to get data from the drive after a single pass overwrite is the least bit interested in your data :)

    https://en.wikipedia.org/wiki/Data_erasure

    "one overwrite is all that is generally required"

    A.
     
  9. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #9
    Attach the drive then right click it in Finder and select encrypt. Then go to Disk Util and select the drive brand name at the top (not just the partition) and erase it. Any data on there is gone forever. Even if someone managed to restore what you deleted it would be encrypted.
     

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