App Server Folders
The Application Server folders store files that will be used from the application server side as opposed to the Web Server.
Since EASYProcess is installed and runs on the Application Server, any files necessary to run EASYProcess need to be stored here. When EASYProcess is upgraded, these are the files that are replaced with newer versions.
Any time a file is available for download from the site, it comes from the Web Server and is saved in a folder on that server which a link is pointing to. However, if the file is going to be attached in an email, it can be saved locally, where EASYProcess is running, on the App Server. When images are shown on the website, such as the site logo, this file usually exists on the web server. However if you are going to use the image to generate HTML and then use that HTML elsewhere such as generating a PDF, the image could be saved to the Application Server.
Other tools also used by EASYProcess will need to be running where EASYProcess runs. The files necessary for those tools will be saved to the Application Server. An example of some of these tools are Solr, EEM, or the JDE BSFN Server.