What constitutes a out of harm`s way destruction of background on CD/DVD or floppy medium.
Answers:
Ya, merely breaking it will preserve run of the mill ppl out of it. Otherwise you own to completely soften it down to hang on to the Gov't out of it.
If any shiny portion is departed. A lab can run it underneath an electron microscope and restructure doesn`t matter what information is gone on it.
Shredding or burning.
you can burn it
Under most circumstances breaking a disk in partly is ample. But if you are trying to store something from someone who have deeply of resources, later shredding would be better.
I don't know how to shred CDs, DVDs, OR floppies. I purely snap the disks within two and drag a pierce or screwdriver across the floppy. By the time it get through my trash compactor, not a soul could find it much smaller number retrieve any background from it.
burn em .or go and get the ones that self destruct within 3 minutes
If you are worried in the region of the CIA next shred them but if you are simply worried nearly dumpster divers than broken within partly should meet your requirements.