Are files that are uploaded to a Jamroom site accessible via the server? i.e. Is there a particular folder on the server that can be access by the site owner?
Yeah - if you have FTP/SFTP access to your server, you will find all the media files are stored in the data/media directory. Within data/media there are first "profile group" directories (basically grouped by the thousand) and then inside each group directory you will find the actual media directories for the individual profiles. The files have fairly readable names -i.e. "jrTicket_25_ticket_file.jpg" so you should have no problem seeing what they are.
Let me know if that helps.
Founder and Lead Developer - Jamroom