Start Windows Explorer and if there is a beside your C: drive click it so your C: drive opens and it becomes a . You will see something like this (without the Left Side, Right Side labels). Be sure to set your view settings the same as mine or you will become confused.
Each of the 's on the Left Side is a folder. To open one of these folders on the Left Side click on it and it will open and look like this . Its full contents will then be displayed on the Right Side .
Each of the 's on the Right Side is also a folder. To open one of these folders on the Right Side double click on it and it will open and look like this on the Left Side . Its full contents will then be displayed on the Right Side .