Beginning May 3, 2019, you will no longer be able to create classic Google Sites in U-M Google. For the time being, existing classic Sites will remain available for updates. This step is in preparation for the eventual retirement of classic Sites. We urge you to convert any remaining classic Sites to the new Sites format. Beginning May 3, you will only be able to create new Sites in U-M Google.
New Google Sites are stored in Drive, so you can create them like any other Google file type. From Drive, click +New > More > Google Sites. Classic Sites remain available at sites.google.com by clicking Back to Classic Sites.