If you're wanting to convert a directory (folder) full of files, and not a .DIRECTORY file, there are a variety of free file converters.
Ọ bụrụ na ịchọrọ igbanwe ndekọ (nchekwa) jupụtara faịlụ, ọ bụghị faịlụ DIRECTORY, lelee ndị na-agbanwe faịlụ a n'efu .