The ability to record data and process the data offline is used in all engineering fields. Depending on the field the amount of data can vary greatly. When signals in the electromagnetic spectrum need to be recorded the amount of data is dependent on the bandwidth of the signal. As signal bandwidths become wider and wider more and more data need to be stored, transferred, and analyzed. This article focuses on applications such as COMINT, ELINT and SATCOM, which all produce a high amount of raw data, and on how to avoid getting unnecessarily large data files which make further offline processing challenging.