a)Files are put in a directory.
b)All directories are in a hierarchical structure (tree Structure if you want to know about tree structure. do like that in windows start ->run give cmd.Then command window will open then type tree and enter it will give tree structure of the given directory).
c)User can put and remove any directories on the Tree.
d)Top directory is “/”, which is called slash or root.
e)Users have the own directory. (home directory)