This USB adapter converter cable adds storage space to your computer. It supports CD-ROMs, DVD-ROMs, CD-RWs, DVD-RWs, and external hard drives up to 2 TB in size. All you need to do is connect the cable to a USB 1.1 or 2.0 port, and it will automatically run. The cable can achieve data transfer speeds of up to 480 MB/s with a USB 2.0 interface. It's also compatible with older Windows 98SE, Windows 2000, Windows ME, Windows XP, and Mac OS operating systems.