1.Click the "Run", type CMD, enter, then enter the CMD mode (command prompt).
2.In the command prompt type the command "md d:\secret..\"(there are two periods).Then you can see then secret. folder in the d:\ root directory.
3.You can try to double-click the folder,how,it will prompt an error.Now nobody can open this folder,Then you can copy some files which you want to hide,such as commercial confidentiality and any private pictures and so on.And it can not be deleted.It is very safe. Read more