A Blu-ray burner is a device that allows users to write data onto Blu-ray discs, which are high-capacity optical discs. These burners can store significantly more data than standard DVDs, making them ideal for backing up large files, movies, and games. They use a blue-violet laser to read and write data, which enables the higher storage capacity. Blu-ray burners can be found in both external and internal formats, allowing for flexibility in use with various computers. Many modern Blu-ray players can also read these discs, making it easy to enjoy high-definition content.