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.
Show manual changes beside the prior decision for quality review.
Your document review and approval process has a clear next step: a linked task with the changes and prior decision for the revised manual.
Open a review showing the new SOP step and required sign-offs.
Your quality manager gets a linked SOP review showing the new step and required sign-offs before the revised procedure can be released.