I have ~10 HDDs that I’d like to dispose of. For a while, I tended to buy unwarrantied used disks for my NAS, so these have all failed in some form or another over the years. I can’t just toss them, because they have my (unencrypted) data on them, but I can’t wipe them either since they don’t mount anymore. I want a simple and reliable way to render the contents unrecoverable. A nation state is not part of my threat model, but any kind of data reconstruction that could be bought with civilian money is.
I’ve tried:
- Smashing with tools (largely ineffective)
- Punching holes with a drill press (how many holes are needed to ruin the disk? Also I’ve broken/dulled a few bits doing this)
Bigger hammer and a concrete surface. Three good whacks to the thin sheet metal casing (opposite the drive motor/PCB) should shatter the platters inside.
You can also buy a sharp punch that looks like this and punch thru the sheetmetal side to really get those platters broke.
Realistically if they’re already failed, nobody is going through the effort to send these disks through any kind of speciality recovery for a random john q public anyway.