Oh and no, I do not trust DVDs, CDs, etc. I have lost lots of CD/DVD even though they were kept in binders in a closet in a room where temperature and humidity was controlled far away from UV light from the sun. I've seen layers from DVDs delaminating from one another ripping apart the data layer. I'vee seen DVDs simply go blank without any reasons, etc.

In my opinion, Hard Drives remain the cheapest storage media and a proper HD rotation routine and backup scheme/schedule will ensure you keep your data safely.