1. The window of D2D is basically made up of two listed windows. On the left there are files from your computer, and on the right there are files that are from the internet hard disk.

2. If you need to download or upload, please use your mouse to move the files. You can move the files to the left to download, and move the files to the right to upload.

3. The tool bar on the top will help you to manage files.