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.
Open one review per manual revision with changes and prior sign-off.
Your document review and approval process has a clear next step: a linked task with the changes and prior decision for the revised manual.
Link a revised SOP to its new review and earlier approval.
Your quality manager gets a linked SOP review showing the new step and required sign-offs before the revised procedure can be released.
Share the exact report revision and record who received it.
Your reviewers get a link to the right report revision, and you see who can open it and where delivery needs attention.