You need to connect iPhone to Mac with USB cable and the software will detect your device automatically. Then you can see the information of your iPhone shows on the center of interface, including capability, version, Serial Number, and so on. At the left sidebar, the LIBRARY and PLAYLIST in your iOS device will be listed there accompanied with the LIBRARY and PLAYLIST of iTunes.
There are 4 ways for you to add files or a folder from Mac to iOS device. 1. Just drag and drop files or a folder to the main window. 2. Click the “Add File” button at the top middle of the interface. 3. In “File” menu, choose “File > Add > Add File/Add Folder” to complete this operation. 4. Under LIBRARY, right-click any type of files, then there will pop up a menu with “Add File” and “Add Folder” options.
Once you click “Add File” or “Add Folder” option, you need to browse and choose the files or folders want to add in the pop-up window.
After you have chosen and added files or folders to the software, a dialog of transfer process will show up. This dialog shows you the percentage of the transfer, and the names and numbers of the files being transferred will also be shown. When the transfer is ongoing, please don't disconnect the iOS devices.