Your CDs and Blu-rays won't last forever — what is disc rot and should you worry?

CDs and Blu-ray discs are susceptible to a degradation process known as "disc rot," caused by oxidation of the metal layer or breakdown of the lacquer bonding. The process can result in permanent data loss, though its pace varies depending on manufacturing quality and storage conditions. Experts recommend digitally backing up collections but say there is no reason for immediate alarm.