D Disk. Okra video is a video application software under Hefei Wave Zero Network Technology Co. Ltd, a new platform for live socializing. In the computer to download the application software should be downloaded in the D disk, do not download in the C disk, C disk and D disk are referred to the partition of the hard disk, C disk are loaded with system software, D disk is generally used to install software and information, such as installing software in the C disk will cause computer lag phenomenon, resulting in the system response is too slow, affecting the system operating speed, so the download of software should be stored in the D disk. Computer hard disk is the computer's most important storage device, the computer needs to run normally most of the software required are stored on the hard disk, hard disk storage capacity.