Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Flag client proof access gaps before review deadlines.
Your production team gets a morning view of who can open today's and tomorrow's proofs, with clear flags for reviews that need a fix or manual check.
Update client launch folders with links to approved replacements.
Your launch folder points to the replacement your reviewer cleared, so your campaign team finds the right file at handoff.