mp4 player

i want to know if mac have an application to add songs to my generic mp4 player i dont have a pc so i cant install the software of the mp4 player its a mp4 rockchip usb 4gb so i f anybody knows an application for manage my mp4 player please tell me thx

I don't know which player you have but take a look at Songbird

Songbird - Open Source Music Player