Font Awesome ‒ Icon search: "free" "folder"s
Appearance	Name	Family Style	Glyph	Unicode	SVG File
	folder	Classic solid		f07b	folder-solid.svg
	folder	Classic regular		f07b	folder-regular.svg
	folder-open	Classic solid		f07c	folder-open-solid.svg
	folder-open	Classic regular		f07c	folder-open-regular.svg
	folder-closed	Classic solid		e185	folder-closed-solid.svg
	folder-closed	Classic regular		e185	folder-closed-regular.svg
	folder-plus	Classic solid		f65e	folder-plus-solid.svg
	folder-minus	Classic solid		f65d	folder-minus-solid.svg
	folder-tree	Classic solid		f802	folder-tree-solid.svg