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.
Check access to publication proofs before assigned reviews are due.
Your approval task shows whether the reviewer can open the current proof before the due date, with a request for a corrected link when needed.
Link the revised page proof before routing its next review.
Your rework card points to the latest image or PDF proof, with the next reviewer clear when a shared file changes.