Dropbox and Google Drive when offline

Need some advise. Is it possible to still access to Dropbox and Google drive when the Passport Wireless is not connected to the Internet. Do I need to create a folder for them? Is it possible to sync the files when connected back online. I was hoping that the wireless is able to backup the Google drive and Dropbox so that my ipad is still able to assess them when Internet is not available.

In a computer, Dropbox is able to grant local off-line access if you have the app installed in your computer, but as far as I am aware the iPad version of Dropbox requires an active Internet connection since it will look for server files as opposed to local files first.