Plug in player with the USB cord that came with it into USB port on computer. Go to "My Computer" on your computer, find device listed there when computer recognizes it. Open device. Open Music folder on device. Just drag the files from any of your folders on your computer into the Sansa's music folder or choose "send to" after right hand clicking on your file. Make sure the file format is supported by player. You do not have to "safely remove hardware" when unplugging Sansas from your computer.