A couple of things to note...
- You still need to enable offline access for your Google Docs/Sheets/Slides (it's shown in the tutorial).
- You can only set up the Google Drive Desktop App for one Google Account at a time. So if you have a personal account and a work account, you will need to choose between them (tip: create a shared folder for stuff you need access to from either account). Teachers who are storing student data, should use their Google Apps for Education (GAFE) Account and not their personal Gmail accounts.
- Files that have been shared with you won't sync until you add them to "My Drive" or a synced folder in your Google Drive.
In the video below, I will show you how to set up the Google Drive Desktop App using a Windows 8 computer and the new Google Drive interface.