Supplemental data storage
This section allows you to store a copy of some or all of the users' data in servers located in the country you select, acting as a redundant copy of the standard Google Datastore.
To activate this option, select any of the countries you see on the list and click Save. Keep in mind that this may take up to 24 hours to be applied to all the users in this domain. Once you have organizational units, you can use them to limit the scope of the supplemental data storage.
At the moment of writing this, the only option is the Russian Federation. This was a response from Google in 2015 to comply with a law requiring internet companies to store Russian's data within the country, so if your organization is based in Russia, you might be legally required to use this option.
This is a very specific case of legal compliance. In the next section, we will learn how to set up more common Legal and compliance settings.