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.
Keep proof handoffs clear when creative files change.
Your review tasks point to the latest proof, with a comment naming who saw the previous version so the next handoff stays clear.
Spot proof access problems before they hold up creative reviews.
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.