Nowadays, we're using just a handful of data storage media. Flash memory is arguably king, found in SSDs, memory cards, and the storage chips of countless devices all across the world. HDDs are still very important; they aren't as common in the consumer market as they used to be, but they're still the most widely used storage medium in data centers and homelabs. Lastly, there are Blu-ray discs and CDs, which aren't as popular as they were a decade ago but are still used to store movies, games, and music.
