Save problems

I have been experiencing a problem saving and load, im learning blender and sit and watching the tutorial how to make a anvil in Blender. I am using the v2.82a, and the Blender guru is using Blender v2.79, so i sit infront of my 65" Tv with my Predator Helios 500 Laptop copying his process, a very good way of learning Blender, so its getting late so i decide to save my work, so i go to file and press save as, thinking go back to it the next day open Blender the open what i save nothing is there, can anyone know why Blender2.82a does not save?