Not a single byte of data ever leaves your Google Account.

Internally, this is a Google Script that runs inside your Google Account, reads the files found in Google Drive and writes their access details in the spreadsheet. Getting started is easy. First, install the Google Drive Auditor add-on and authorize it. If you have been collaborating with people for some time, Drive Auditor is the easiest way to find out what you’ve shared in Google Drive and sanitize it. Meet Permissions Auditor for Google Drive, a new Google add-on that scans your entire Drive and then generates a comprehensive report revealing who has access to your shared files and what kind of permission they have on the files. Would you like to know which files and folders in your Google Drive are shared with other users and what kind of access permissions they have on your files? Google Drive, unfortunately, doesn’t offer an easy option for you to figure out who you are sharing the files with either inside or outside your organization.

These users could be your contacts, someone within your Google Apps domain or some of the shared files could be public meaning they are available to anyone on the web who have the link (URL) to the file. You may have a number of documents, spreadsheets and other files in your Google Drive that are accessible to other users.

Find all shared docs google drive