Google Drive has been experiencing intermittent problems since about 3:00 PM. Some users have reported that after logging into Google Drive on the web, their files appear to be missing.
Google has updated their status page with more information. Click on the small dots under today’s date: http://www.google.com/appsstatus
Update 3:49 PM: Service appears to have been restored since 3:12 PM
We apologize for any inconvenience
-Computing and Communications Services