I just bought sd card for my ilo but when I try to

You need to format all new cards. Does your Mp3 player show up as a drive when you hook it up to your computer if so open that drive right click on format use FAT32 for windows os. If your Mp3 player does not show up as a drive use the SD slot on your computer to format. Choose the SD card slot drive right click on the drive choose farmat... use FAT32 for windows os. and you should be off and downloading great tunes... Good luck hope that helped.