One advantage of storing the files in the database is that if you have a large number of servers accessing the db and files then it makes syncing updates to the files much easier. Also if those servers are on a DMZ and the db server is on another DMZ you dont need to open ports for sync software or filesharing connections (AFS/NFS/CIFS etc) or need large amounts of space on the servers for duplicated files.

-Waswas