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Yes, a HDD magnet is fine or any neodymium one and will destroy the data by sweeping such a powerful magnet across the surface of a disk. However, the reliability of such a procedure may vary. You can also build your eraser in a similar manner to making a head demagnetizer for tapes (which is pretty simple: insulated wire, nail and an input voltage source). ...


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"Shred" isn't always as effective as you might think, since it relies on the assumption of in-place overwrites. Using a Solid State Drive (SSD) with TRIM function enabled will reliably remove deleted data, but sometimes there's a delay that can stretch out to many minutes before TRIM does its thing. None of the above approaches address alternate storage ...


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Ideally you need a bulk degausser. Back in the day of cassette tapes you could get a bulk degausser for about $20. Alas, this is now a specialty item and runs around $100. Using something like a neodymium magnet waved around the surface will selectively damage portions, making it unreadable by normal efforts. You have to decide the threat level you're ...


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