Task: i want to delete an audio file named wednesday at 1;50 pm it  has some background noise that i recorded using the recorder app
Steps:
click on the last option ( Wednesday at 1:50 PM) at the bottom of the screen 
click on vertical three dot menu at upper right corner of the screen to reveal a drop down menu with additional options
choose last second option ( delete)  from drop down menu at the upper right side of the screen 
from the  pop up window select the delete button in the center of the screen