I plan on relocating my Music folder (100gb) to an external drive. I assume that this procedure does not actually relocate the files. You mention in Step 11 'a few seconds'. Transferring all these files will most likely take several hours. I would still like iTunes to recognize the new location. Is it necessary to make a registry edit as it was when I relocated a complete user profile? At an earlier date I changed the location of my user profile but have since moved it back to C:.