Macintosh HD is not showing up in Disk Utility
I am trying to factory reset my 2015 Macbook pro. However as I shut it down and turn it back on a file folder with a question mark kept on flashing. I turned it off and pressed command R to recover and fix anything that I could but on the disk utilities Macintosh HD and Macintosh data are no where to be seen... any ideas on how to solve this problem?