Now available – Azure Database for PostgreSQL: 4-TB server storage now available
If you are currently using Azure Database for PostgreSQL, you can now create 4-TB servers or update existing PostgreSQL server storage to 4 TB when using the General Purpose or Memory Optimized pricing tier. With this increase in server storage, the service now supports even larger workloads and provides you with the peace of mind of knowing that you can easily accommodate future growth.
Source: Azure Roadmap