The Types of Things People are Using SYNC for in Sync General Discussion Posted August 1, 2013 · Report reply I'm using it to sync my work machine (PC) to my home machine (MBP). For the most part trying to figure out syncing my music library at work with my library at home. I'm syncing my work music library to my "Automatically Add to iTunes" folder on my home Mac but there seems to be a bit of a timing issue there. I think my "Automatically Add to iTunes" folder is scanning that folder too quickly and moving my audio files to "Not Added". The files are getting created as "x_song.mp3.!sync" on my home machine. Anybody else trying to do a similar thing? I'm having the exact same problem as you. Would really like to solve this!