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 current client scope beside service quotes for review.
Your quote approver can review the latest client scope beside the proposed terms, with differences called out before they decide.
Flag missing approvals on service quotes before they go to clients.
Your sender can see whether a quote has cleared internal review before it goes to a customer. Missing sign-off stays on the document for follow-up.