Dropbox
Deliver approved files from Dropbox without expiring links.
Sync a Drive folder to a portal – new files show up as versions for review.
Link a Drive folder to a portal and keep working where you are. New files appear in the portal as versions for review; files with the same name stack as v2, v3 and so on.
Approved files can be copied back to a Final folder in Drive, so your archive stays tidy too.