По запросу: "Add file extension" найдено 144 иконки.

ic_fluent_sticker_add_24_regular Created with Sketch.
ic_fluent_bot_add_24_regular Created with Sketch.
image/svg+xml plus
ic_fluent_folder_junk_48_regular Created with Sketch.
video-file-filled
i
file_doc [#1723] Created with Sketch.
file_txt [#1733] Created with Sketch.
transfer-upload image/svg+xml transfer-upload
copy-file
ic_fluent_upload_24_regular Created with Sketch.
file_star_fill
file_url [#1734] Created with Sketch.