My Chinese business associate in China said: "For your information, because my whole system is Windows 8.1 + Office 2013, including automatic file syncs on Microsoft OneDrive, there will be compatibility issues if I change all files to Google formats. So, may I suggest we put original files on Google Drive first, and then “transform” them into whatever format when needed?" He thinks I am some kind of expert but I have very limited experience or access to Windows 8/8.1 and no experience with OneDrive.