You can upload content to the tmp directory.

Contents of /pub/

.. (parent directory)

tmp
  directory
06/28/18 03:43

rack
  directory
06/27/18 14:59

momslogo
  directory
07/27/18 20:38

garyImages
  directory
03/17/18 17:00

upload
  directory
09/24/15 23:25

lotto
  directory
07/27/18 20:43

flogNew
  directory
03/28/17 19:05

web tools
  directory
10/03/18 18:17

recipies
  directory
10/04/18 17:21

Working Class Hero
  directory
05/17/17 19:44

./haha.jpg
35kb   image/jpeg
03/24/17 22:08

./ryanstefani.pub
468b   text/plain
10/22/14 21:37

./feature.jpg
68kb   image/jpeg
07/08/15 13:11

./alpineManicure.jpg
238kb   image/jpeg
01/15/18 05:31

./ not-a-bug.jpg
68kb   image/jpeg
07/08/15 13:11

./popsicles.jpg
50kb   image/jpeg
08/10/12 21:51



More stuff: oneDrive dropbox