Hi I just bought a. Hi I just bought a micro SD Card for my cell phone and I have no clue how to

Question

Hi I just bought a micro SD Card for my cell phone and I have no clue how to use it and there is no instructions that comes with it at all so I was wondering if you could tell me how to put songs,photos, and videos on my micro SD card so it can go on my cell phone. Thank you very much and a Merry Christmas!