To create a new folder in the root directory of the C
drive (for example), from Windows Explorer, click on the C
drive first, then click File (on the menu at top-left),
New, Folder, type in a name and hit the Enter key . . .
The new folder will apear on the RIGHT side until you give
it a name and hit Enter, then it will show up on both
sides.
To create it in a different folder, double-click on that
folder first, then do as stated above.
Good Luck !