Files and Folders
No matter which file system is used you need to organise how the files will be stored so that they are easily located when you want to use them. Note that in earlier operating systems there was a limit to the number of files you could store on a drive's base area (commonly called the root directory).
One way of describing the way files are stored on a hard disk is by thinking of it as a tree. The root directory is the root of a tree and each directory or folder that you create is like a branch. Other branches can come from these and on each branch you can have leaves which are the files on the computer (See diagram).
The full path of a file starts from the root directory and ends with the file name. In the example in the picture, the full path of sol.exe is C:\Windows\sol.exe.