I'm very new to Wordpress. With the help of my friend I installed Wordpress on my server and finally we have our web online. However, I would like to upload some content in media library but I need to organize it in folders. Now we organized it with date-time hierarchy but its not enough. Is it possible having an access to the physical server where I have my site to create some directories and upload files to it using wordpress (I would like to create them inside the date-time directories)?
Where do I need to create such folders, how can I check where my friend installed wordpress and find the directory I can create some subdirectories?
Do I need a wordpress plugin or can it be done manually on server?
We installed our wordpress on Ubuntu 12.04 Server.