NIST SP 800-88
This is the United States guideline for media sanitization, and it is the one most company policies name. Revision 2 was published in September 2025 and replaces Revision 1 from 2014. If your policy still says Revision 1, it is worth updating the reference.
The guideline describes three levels. Clear removes data so that ordinary tools cannot get it back. Purge removes it so that laboratory methods cannot get it back. Destroy makes the media itself unusable, for example by shredding. Which level you need depends on how sensitive the data is and whether the device will be reused.





