Starting today, you can create Amazon RDS for MariaDB, Amazon RDS for MySQL and Amazon RDS for PostgreSQL database instances with up to 32 TiB of storage. Existing database instances using SSD-backed storage can also be scaled up to 32 TiB storage without any downtime. The new storage limit is an increase from 16 TiB and is supported for Provisioned IOPS and General Purpose SSD storage types.
The 32 TiB storage size supports larger databases and it also allows you to consolidate database shards into a single database instance, which will simplify your application code and reduce database administration work. To learn more, please visit the Storage for Amazon RDS documentation page.
Source:: Amazon AWS