Dealing with Large CSAT CSV Files: Seeking Workarounds

Hi everyone! Got a question here - I am trying to experiment with loading a large CSAT data file (.csv), but was told a single .csv file can only contain 5000 lines of data 🤦🏻‍♀️. So, I am having to break the file into multiple files with 5000 lines in each one, which is a pain. Have you encountered this issue? If yes, how are you dealing with it? I would love to hear about any workaround you might have successfully used. Thank you!