A Blu-ray burner is a device that allows users to write data onto Blu-ray discs, which are high-capacity optical discs used for storing video, audio, and other digital files. Unlike standard DVDs, Blu-ray discs can hold significantly more data, making them ideal for high-definition movies and large software applications. These burners can be found as standalone devices or built into computers. They typically connect via USB or are integrated into a laptop or desktop. In addition to writing data, a Blu-ray burner can also read Blu-ray discs and often supports other formats like DVDs and CDs.