RuleMgmt -> This folder is used during import and export to extract archives and to build archives respectively. Ensure that there are no imports or exports happening on the node at the time of cleaning up the contents of this folder.
Tracer -> By default the Tracer XML file will be stored in this folder. The XML files will be only available till the tracer is running from the PRPC and on closing the tracer window the XML file will be removed from this folder.
_temp -> no idea about this folder
extractedFiles and extractedFilesVFS - not seen in the Pega temp folder in Pega 7.4 instance.
keytruststorefiles -> seems like it stores the default trust store and key store of Pega as per the folder content.
I have additional questions. Are there any other directories and files will be created? What's the purpose of these directories and files? I noticed that the following directories will be created under certain conditions are met.
(Probably the PassivationData is created when passivation occurred, but what about the others?)