recently i came across a hp c2d laptop. i think it was stolen. it had a bad logic board or gpu and it was worthless. i removed the hard disk and sent the computer back to hp to be dismantled.
i looked at the hard drive, and this guy was a IT specialist, his income was 7000 a month, and it had his social security number, date of birth, address, divorce paperwork, prenup agreement and detailed pictures of his genitals.
i was like man, if that was me i would want my hard drive back
so i went to the managers office at the last place he listed where he lived and dropped it off in their secure mailbox with a note with his name and address and his parents names, hahah
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if you do have a SSD all you have to turn on filevault and encrypt the entire disk. and do a 1 pass erase. you did not have to be mean to it and destroy it, it did not deserve the fate you gave it
file vault is 128 bit encryption. and that encryption would of protected your sensitive data if someone tried to recover your data