Send a screenshot of the HUM -> Admin -> System Preferences -> Purge Details before making changes.
1. Go to HUM --> Admin --> System Preferences --> Job Purge --> Change the "Run Type" to Daily. Change the Data Purge to 3 days or whatever the desired value is .
2. Go to Admin --> System Preferences --> Data Purge --> and modify the values for the different reports till it suits your needs and wait for the job to run.