Gee, I'm glad I emphasised the words FULL and CLEAR because we may have got just a couple of words otherwise. You say you want to search for a file but what does "search" mean? It could mean different things in different situations.

You said in your original post that you want to list every file there was on a drive? Do you still want to do that? If not then what files do you want to list? Just the files in a specific folder but not in the subfolders? Just files of a particular type? Some other filter? How will the user let your app know what files to list? Etc., etc.