1.Open Windows Media Player on your computer (It’s a default program that comes with your computer).
2.Right-Click on the photo you want to assign to your mp3 song file and press Copy . (The photo must be a square size. EX: 300×300).
3.Go back to Windows Media Player , Find the song in music library, Right-Click on the mp3 file than click Paste Album Art .
4.Now close the program, go to your mp3 file .. The Album Cover Photo has been changed
——————- Thanks Everyone