Nice job Chia_Pet! It would be great if you could post your code to the community so that others can make use of it. And thanks for making use of our libraries.
.csv just means a bunch of comma separated data and is not in anyway an excel format. You can always open it in a notepad or any other text editor for debugging. Excel just recognizes the format and shows it to you in a clean tabular form. So in short the .csv format is not limited by Excel’s limitation. Hope that makes sense.