Final Findings

Dropbox
While looking at the data that was retrieved from the Dropbox folder I was able to find information that detailed the app version along with the device type and the android version that the device is running.

This data was found in the prefs.db database and the table is DropboxPersistentPrefs.

I was unable to retrieve user information from the dropbox data, however I was able to find a listing of all of the files along with the timestamps for each of them.

This data is found in the db.db database and the table is called dropbox.

Google  Drive
In the Google Drive databases folder there is a database called DocList.db this database contains a multitude of information, however the table that was most interesting is the Entry94 table it contains all of the files and timestamps along with the creator and owner of each file or folder. This was by far the most informative database between any of the applications that I researched.

OneDrive (Previously SkyDrive)
Within the databases folder there is a database called metadata.db within the table items there are last modified times along with the file names and the owner of the files.

Ubuntu One
In the databases folder for Ubuntu One the database U1files contains all of the files and folders that are contained on the cloud service along with timestamps for when the files were created and when they were last changed.

Within the Shared_Prefs folder there are xml files that contain user data.  The file called com.ubuntuone.android.files_preferences contains the username that is associated with the account along with the plan that the user is signed up for.

If you have any further questions please contact me via Google+ thank you.