But then you can use "find". I use it all the time with hundreds (thousands?) of files in multiple directories with even more sub directories.
find only searches the file names - These desktop search tools do much more than this - They search *inside* the files. They know how read most of the common file formats (including images, searching the EXIM comments and music files) and will match your search to any file which matches.
No use of find, or careful organisation of your file system can do this. Chris