What is the best way to preserve and store old photo prints to ensure their longevity and quality?

The best way to preserve and store old photo prints for longevity and quality is to keep them in a cool, dry, and dark environment, away from direct sunlight and extreme temperatures. Store them in acid-free archival sleeves or albums to protect them from dust, moisture, and physical damage. Handle them with clean hands and avoid touching the surface of the prints to prevent fingerprints and smudges. Consider digitizing the prints to create digital backups for safekeeping.