AiM Motorsport Memory Module. The management of this system is really very simple, just connect the module to your datalogger and the data will be saved simultaneously, both in the logger and on the SD card, there is no additional configuration required at all.
The SD card can be removed and replaced even during pit stops, even while the car engine is still running, making it extremely fast to get the data during endurance races or long tests and when the time at the paddock is really limited.
When your race or test session is over, remove the SD card from the module and slot into your PC and download the data using Race Studio 3. The kit includes a 4Gb SD card, but it can support cards upto 128Gb.