Trimble 4D Control Server comes with the Storage module that reliably archives the data received from the connected parent receiver into data files in different output formats. Thus the data is available for data analysis and post-processing. Storage modules are available for GNSS Receiver modules.
Note that you can also start as many modules of the same type as you like, for example to write one-second RINEX files to a local hard disk and to concurrently write 15-seconds RINEX files to any other path for the same reference station.