OneDrive, Microsoft's file sync app formerly known as SkyDrive, lets you store your files online, edit Office documents in the free Office Web Apps, and easily access your online files from your PC.
Keep reviewer marks tied to the right maker task and proof.
Your maker gets the marked PDF and a clear fix list on the right task, with the reviewed version named.
Surface proof mismatches so coordinators can resolve stalled reviews.
Your coordinator gets both revision links in chat when the task and current proof differ, with the task held for a human choice.