When a new site is created, a default set of directories is created to host your site. Theses directories include:
Some or all of these directories will be available when you log in to access.nsms.ox.ac.uk under a directory named after the primary site name. For instance, if you asked for a site with the primary name of bob.unit.ox.ac.uk, then after you login you will see in your home directory:
and then underneath this
access:~$ cd bob.unit.ox.ac.uk
cgi cron home htdocs logs
Note that the document root for the site is the htdocs directory, and files placed outside of this will not be directly accessible over the internet.