You can upload documents and attach them to an e-mail or you can download and display documents. That are permanent documents.
Temporary documents are documents that were not explicitly uploaded to ARIS document storage, but added to the process during process instance runtime, for example, by adding an attachment to an e-mail. They are saved in the system in a particular safe location and are deleted when the process instance is completed.
Temporary documents can be uploaded to ARIS document storage to become permanent documents.