What is the most helpful mode and method for identifying hoarding behavior in unreported developing and severe cases? Hoarding Disorder (HD) is a disorder that involves the frequent acquisition of items, an inability to discard items regardless of value, and some form of impairment that prevents those afflicted from living a functional life. HD accounts for 2-6% of the population today, although those who have it are likely to never report it or recognize it as a problem than they are to request treatment. Measuring tools would be most effective for adults aged 30-5.