A file system includes first, second, third, and fourth directories where the first and second directories are sub-directories of the third directory, the third directory is a sub-directory of the fourth directory, the first directory stores only files identified by a first file extension, the second directory stores only files identified by a second file extension, and the first and second file extensions are distinct. A method involves receiving first and second requests to open first and second files, respectively, that are contained in the file system. The first and second requests include first and second file system paths, respectively. The first file system path is modified by adding identities of the first, third, and fourth directories to the first file system path. The second file system path is modified by adding identities of the second, third, and fourth directories to the second file system path.