Why traditional sanitization methods as specified in DoD 5220.22-M are not sufficient for SSD erasure and can leave recoverable data behind.
The DoD specification was set long ago, when rotating magnetic media hard drives ruled the IT world. To erase these drives, overwriting all data with zeros or random patterns - whatever the standard offered - was enough. But the world changed and entered the age of digitalization, and with it came new hard drives like SSDs (solid state drives).