The configuration variable db_storage can be used to define the amount of storage allocated to your RDS instance. The chart below shows an estimated amount of storage that is required to index individual chains. Note these numbers are estimates and are constantly increasing. The db_storage can only be adjusted 1 time in a 24 hour period on AWS.
ChainStorage (GiB)
Ethereum Mainnet21000
Ethereum Sepolia5200
Gnosis Chain21000
Gnosis Chiado470
Ethereum Classic555
Note: as of 23.12.2024