Make private, hidden folders only visible to you in the Google Drive. 
This app allows you to create secret folders. You can only access these folders. Any apps and mobile apps can not access to it. 
This app is a useful tool to protect and hide sensitive files on your Drive. This hidden folder can be used to store any types of files that you should hide. but Google Document Formats do not support.

Integrate your Google Drive with Hidden Folder. 
Provides connect with Google Drive. You can directly use this app with your drive. Supports Chrome, IE10+, Firefox, Safari..