How do Showcase Portfolio attachments affect user storage quota?

[ldavenport4015]

In discussing actual use of the Showcase Portfolio it was found that students will be required to attach a lot of files over their 6 to 7 semesters in the program and that brought to light a couple of questions that I can't find answers to in the Canvas Guides. 

1. Will files attached as a part of evidence become a part of a user's files like Assignment submissions? 
2. Will attached files count against a users file storage quota?