File1: Endpoint3 only -
Cloud Tiering: A switch to enable or disable cloud tiering. When enabled, cloud tiering will tier files to your Azure file shares. This converts on-premises file shares into a cache, rather than a complete copy of the dataset, to help you manage space efficiency on your server. With cloud tiering, infrequently used or accessed files can be tiered to Azure Files.
File2: Endpoint1, Endpoint2, and Endpoint3
Reference:
https://docs.microsoft.com/en-us/azure/storage/files/storage-sync-cloud-tiering