I am a first time SD card user on a keyboard and I need some guideince please. I have some MP3 music files on my computer that I would like to convert to play on the WK7600. I have downloaded the Data Manager 6.1 software and the manual,, but after reading thru the manual a few times,,,, it still seems to be as clear as mud. Looking for someone to guide me thru the first use and in simple terms. Thanks for your help.