The raw data retention policy controls the duration for which the raw data is kept in the system before it is deleted.The raw data retention policy cannot be deleted or disabled. However, you can modify the Keep at most and Keep at Least values, which determine the maximum and minimum number of days to keep the raw data file.
The process to delete raw data files runs every time the server is started, every hour because that is when the raw data files are closed, and whenever the Keep at most value is changed. All the files exceeding the retention time are removed permanently from the data storage.