Optical media like Blank CDs / DVDs, and Blu-ray discs were once popular for storing and archiving data in homes and small offices. Most desktop PCs and laptops included internal drives for these formats. CDs offer up to 700MB of storage, DVDs hold 4.7GB, and Blu-ray discs provide 25GB for single-layer or 50GB for dual-layer storage. These options were ideal for users seeking reliable, portable storage solutions.