filing vs storage device

filing

noun
  • The act of storing documents in an archive; archiving. 

  • Something that has been officially filed; a document on file. 

  • Any particle that has been removed by a file or similar implement; a shaving. 

storage device

noun
  • A piece of hardware whose main function is to store data. 

How often have the words filing and storage device occurred in a corpus of books? (source: Google Ngram Viewer )