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The only way to ensure the data on the hard drive is no longer recoverable is the complete physical destruction of the drive. Superheating the platters of the drive so that they lose their magnetism is the most thorough method, though any method that makes the platters unable to be read by a read head is also effective, such as cutting with a grinder or bending with a sledgehammer.

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14y ago

What else can I help you with?