The Finder Toolbar comes with a standard set of action buttons that include back and forth navigation buttons, the different type of file views, Quick look, Actions, and search.
These are the actions Apple believes are the most commonly used by the average user, but sometimes you’d like to add or make modifications to the organization of these buttons.
To do so, open Finder, select View from the menu bar and then Customize Toolbar…
A customization window will appear that includes additional buttons like Add New Folder, Delete, or Eject. I’ve found that I use these actions quite frequently and have added them to the Finder Tool bar for easy access.
To add these additional buttons simply select them and drag them to the Finder Toolbar, or move the toolbar buttons around to fit your preference.