You can share and copy to dropbox b ps4 screenshots. recomend : facebook share option (private), then all screenshots into PSNetwork Album.
If
New photo post by you with hashtag
This Trigger fires every time you post a new photo on Facebook with a specific hashtag.
Then
Add file from URL
This Action will download a file at a given URL and add it to Dropbox at the path you specify. NOTE: 30 MB file size limit.
Discover more time saving integrations for Facebook and Dropbox