Issue
The C:ProgramDataNintexTalon folder filling up with .nas files
Resolution
These .nas files are used by Nintex Analytics.
If Nintex Analytics is not being used in the environment or has been installed by mistake these .nas event files can build up instead of being sent to an Analytics workspace.
1. For SharePoint 2013, navigate to Central Administration > Nintex Workflow Management > Analytics
For SharePoint 2016/2019, navigate to Central Administration > Nintex Administration > Analytics
2. Deactivate Analytics
Additional Information
Once Analytics is deactivated the files in C:ProgramDataNintexTalon can be manually deleted.