DVD-Rs are a type of optical disc used for storing data, including videos, music, and documents. They can hold up to 4.7 gigabytes of information, making them suitable for recording movies or backing up files. Unlike CDs, which have a smaller capacity, DVD-Rs offer higher storage and better video quality. A DVD-R is a write-once disc, meaning that once data is recorded, it cannot be erased or rewritten. This makes them ideal for permanent storage of important files. Many DVD players and computers can read DVD-Rs, allowing for easy playback and access to the stored content.