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.
Link the reviewed PDF to the original maker’s rework task.
Your makers get a rework task with the reviewed PDF and rejection reason, so the next revision starts from the right file.
Record approval decisions against specific proof revisions.
Keep a clear history of who approved or rejected each campaign proof, even when the review board status changes later.
File dated report documents with links and clear failure notes.
Your Markdown reports become dated Google Docs in a shared folder, with a results note linking finished files and naming problems to fix.