RWD is a data file that store logs for NRG Systems Symphonie Data Retriever a software tool for analyzing wind speed and direction. RWD files saved data in binary format.

RWD files are created by data logger modules which are designed to capture environmental data from sensor devices. RWD files can be saved to local disk or external storage devices such as SD cards. RWD files cannot be transferred over the RS-485 serial interface network.