Now available – Azure Database for MySQL: 4-TB server storage now available
If you're currently using Azure Database for MySQL, you now have the ability to create 4-TB servers or update existing MySQL 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