Files & Folders

What is the difference between file and folder? Perhaps it helps to look at the verbs to file and to fold:

to file ablegen, abheften, einheften, einordnen, erfassen, speichern, archivieren, zu den Akten legen

(the FreeDictionary by Farlex:) to file to put or keep (papers, for example) in useful order for storage or reference.

to fold falten, zusammenlegen, zusammenfalten, klappen,  knicken

(the FreeDictionary by Farlex:) to fold to bend over or double up so that one part lies on another part

file die Akte, Datei, Kartei, Mappe, der Ordner; der Karteikasten

(the FreeDictionary by Farlex:) file

1. A container, such as a cabinet or folder, for keeping papers in order.

2. A collection of papers or published materials kept or arranged in convenient order.

...

folder der Ordner, Aktendeckel, Schnellhefter, die Mappe, Faltmappe; der Prospekt

(the FreeDictionary by Farlex:) folder  

1. One that folds or is folded, such as a booklet or pamphlet made of one or more folded sheets of paper. 

2. A flexible cover folded in the center and used as a holder for loose paper: a file folder; a hanging folder.

 

manila folder die Aktenmappe (aus Manilakarton)