List of Most of File Type extension for drupal File field : 

jpg, jpeg, gif, png, txt, doc, docx, xls, xlsx, pdf, ppt, pptx, pps, ppsx, odt, ods, odp, mp3, mov, mp4, m4a, m4v, mpeg, avi, ogg, oga, ogv, weba, webp, webm, zip, tar.gz, sql, sql.gz