What are CDs, DVDs, and USB drives commonly categorized as?

CDs, DVDs, and USB drives are commonly categorized as storage devices because they are primarily used to hold and store data. These media allow users to save various types of files, such as documents, music, videos, and software. Each of these devices facilitates the storage and retrieval of digital information, making them essential components for data management and backup.

Storage devices are critical because they not only provide a place to keep information but also allow for data transport and distribution. CDs and DVDs can hold significant amounts of data on physical discs, while USB drives offer portable storage solutions that can easily be connected to various computers and systems to transfer files. This categorization highlights their primary function in computing – maintaining persistent data that can be accessed and used as needed.