PolarDB for PostgreSQL(Compatible with Oracle) provides three billing methods for storage, which are pay-as-you-go + storage plans, pay-as-you-go, and subscription. They each correspond to a set of billing rules.
PolarDB charges fees for the storage capacity consumed by your clusters. For more information, see PSL4 and PSL5 and Storage Capacity. For more information about the billing rules for each billing method, see the following topics: