The advantage of session-exchange is that the user can allow for uploading and downloading of files to other users, and only have the musicians work on the most recent edits of the auditory product (i.e. "songs"). When you create a song in Ardour, you are required to either create a session, or open an existing session. This allows ardour to create subdirectories to store all audio data into a concise location on your computer system. Ardour uses the term '''snapshot''' to relate to a '''new session''' file that is generated (i.e. not affecting the original session) that simply stores the '''current state of the edited session'''. No doubt, all of the original files are shared with the other users, but as other users add their own contributions to the song, then only the snapshot needs to be shared, thus saving space and transmission time. This is an efficient method of collaborating a song via the Internet...