By default, when you open a drive or folder in Windows 10, you can see its name in the title bar of the File Explorer.
If you want to show the full path instead of the name in the title bar of File Explorer, then follow the below steps.
Launch File Explorer Options.
Navigate to the View tab.
Hit the Ok button at the bottom.
From now on, you can see the full path in the title bar of File Explorer.
Note: You can’t see these folders (3D Objects, Desktop, Documents, Downloads, Music, Pictures, and Videos) path in the title bar if you try to open them from This PC or Quick access.
If you want to go back to default, then unselect the option mentioned in the steps.