Which optical disc capacity is common? 100 GB 4–8 MB 650–700 MB

The most common optical disc capacities are 650–700 MB, which is typical for standard CDs. For clarification: - DVDs typically hold about 4.7 GB (single-layer) to 8.5 GB (dual-layer). - Blu-ray discs commonly have capacities of 25 GB (single-layer) to 50 GB (dual-layer), with some advanced versions going up to 100 GB. However, of the options you've provided, 650–700 MB is the most common for optical discs, specifically CDs.