It allow you to transfer files between your N73 SD card and computer without the need to install any drivers. You can use the Data Cable function in the Tool menu. Set the Data cable mode to "Ask on connection". Connect the data cable between the N73 and your computer. Choose mass storage on your N73 and you can see your memory card of N73 in the Windows Explorer. You can now copy your music, videos, pictures and files between your computer and the SD card.