Quick Access is a new feature in Windows 10 File Explorer navigation pane. It is where Explorer opens by default instead of This PC which was the default in previous Windows versions. Whenever you open a File Explorer window, you will see a list of frequent folders and recently accessed files. But you can disable all that if you don’t want to like it.
windows 10 remove quick access
Step 1: Click right mouse button on Start Menu or press “Windows + D” shortcut key
Step 2: Click “View tab” on menu file explorer as above figure
Step 3: Click Options -> Change folder and search options