As well as your normal CSE home directory, you also have access to a separate directory on central UNSW file servers, maintained and provided by ITS.
Files placed there do not affect your CSE disk quota; you can store things there even when your CSE home directory is completely full.
How do I access it?
On any CSE Linux machine (eg. lab computers and login servers)
It is available under the /unsw/<Your zID> directory on the file system.