
Start -> Run -> type cmd -> OK
Then type convert X: /FS:NTFS in Command Prompt window
(where X is the Drive letter of which drive is converted into NTFS)
After the changing of file system you should follow the steps below:
Windows Explorer -> Tools -> Folder Options -> View then uncheck the item
Use simple file sharing (Recommended)
after this task, right click a file or folder; go to
Properties -> Security
Here you can allow permission to a user or user group for accessing that file or folder means you can deny all other users to open that file or folder.