Combine files from BME688 experiment to analyse in Bosch AI Studio

I would like to ask for advise how to join .json.bmerawdata files from BME688? I have run the experiment over few days, but I had to turn off the measurments for a few minutes every ~24h. At the end, I would need to have all the results in one .bmerawdata/.json file. I would appreciate advise from someone who experienced similar problem.