If they are spinning rust, then a drilled hole is sufficient against most forms of data recovery. A plastic syringe full of CLR Calcium Lime Rust remover injec

If they are spinning rust, then a drilled hole is sufficient against most forms of data recovery. A plastic syringe full of CLR Calcium Lime Rust remover injected into the drilled hole will finish the job. If money is not a factor then it's a lot easier and faster to take them to a shredding service. [1][2] Shredding disks regardless of spinning rust or SSD will make data recovery nearly impossible. [1] - https://www.youtube.com/watch?v=sQYPCPB1g3o https://www.youtube.com/watch?v=sQYPCPB1g3o [2] - https://www.youtube.com/watch?v=6-onP1XPJwo https://www.youtube.com/watch?v=6-onP1XPJwo