Scientific data flow within the GRBAlpha payload and platform components. Black arrows show the direction of the signal path originating from the MPPCs attached to the detector. The signal streams processed by the MCU are then being routed into various directions, depending on the currently running data acquisition configuration. Red arrows represent DataKeeper packets while blue arrows represents individual files that are retrieved either directly as file fragments or scrambled for forward error correction. File fragments can also be transferred to DK for employing the DK-based retrieval. Green arrows represent the copying functionality between the two payload nodes. This functionality allows both scientific data transfer between the two nodes (currently only for redundancy at block level) and aiding firmware upgrade by cloning either the main program binary image or the FPGA bitstream image if needed.