In EcoStruxure Building Operation V3+, The External Log Storage is a new feature that allows the system to write and read event and certain trend log data to/from a TimescaleDB database for long term storage. TimescaleDB is an extension to PostgreSQL, which is a well-known database that has been used in the industry for many years. Together with TimescaleDB, PostgreSQL will handle time-series data more efficiently. Only the hardware on the database PC will limit the amount of stored historical data.