Optical drives are still essential components despite many computer manufacturers omitting them from their lightweight laptops. The Blu-ray disc is still the only disk format capable of storing high-definition full-length films, and audiophiles are sparking a rise in demand for higher quality audio from CDs over compressed digital files. Visit Overstock.com for a great selection of internal and external optical drives that install in desktop machines and laptops. Check out the slim and super-slim DVD-writer drives from brands such as Asus, LG, Dell, and Kanguru that are compatible with MAC and Windows operating systems and can read and write DVDs and CDs. Choose between tray-loading drives that are easier to pry open and remove disks in the event of problems, or slot-loading drives for easy transport. For viewing and writing, you need Blu-ray reading drives that let you watch movies in high definition, or a Blu-ray writer that lets you burn high-definition files to Blu-ray disks.