Just forget about filefield and writeyou your own file saver/getter once, trust my 10years django experience. In your DB so called "file field" is just simple charfield, so there is no magic, except django design headache.

If you go this way you won't lose anything as your project growup but you will definitely have more control over media files in your system.

In production you willuse something like nginx for file server, with different location, maybe even mounted network partition