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.
Put checked PDF links beside their source files in the request sheet.
Your team gets checked PDF links in the spreadsheet, with clear issues on rows that need a fix.
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.
File converted documents in mapped folders and report any altered structure.
Your Markdown files become editable documents in the right shared folders, with links and formatting issues collected in a daily report.