That first image I posted was taken with my Chromebook.
Now I am on my Linux laptop with a Firefox browse, and that third upload space isn't there.

When you click that little box to the right of the big top space it opens to your list of directories.
For you to pick where you want your uploading to go.

Normally I am inside a directory when I upload something.
So in this case I may be able to feed it a whole directory.