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.
Send checked roster CSVs and exception lists to the shared folder.
You get a clean CSV from revised Excel rosters, plus a matching list of rows to correct in your shared handoff folder.
Turn incoming workbooks into CSV files for data handoffs.
Get a CSV and row count from the worksheet you choose when your team uploads an Excel file to the handoff folder.