Spanning Backup for Google Apps backs up the five core Google Apps services - Gmail, Drive, Calendars, Contacts and Sites.
Spanning Backup, like other Google Apps backup providers, rely upon the Google APIs to receive a copy of our customers data to back up. The APIs do not provide access to certain data types, such as Google Forms, Google Scripts, Drive Add-ons, certain Site components, and some 3rd party files such as Lucidcharts and Smartsheets.
We also do not back up zero byte files, as these are typically corrupt files - instead, we report an error that occurred, so that our customers are aware that this file has likely been corrupted.
Here is a list of some of the items that Spanning does not back up.
Any time we are not able to back up a portion of a customer’s Google Apps data, we report on this through our status dashboard with the exception of certain Google Sites components and Google Drive Add-Ons