Hi. Long time lurker, first time poster. So, I've had my iTunes and iPhoto libraries on an external drive for a while now. System has worked fine for me thus far. However, yesterday saw a confluence of weird circumstances, and now I am not sure which of them is causing my issue. First: I recently had my logic board replaced in my 2008 MBP. Because I was at my 5 computer authorization limit already, I had to deauthorize all and then reauthorize my newly repaired machine. Second: I opened iTunes and dropped a couple of movies into it, and synced my iPad. HOWEVER...afterwards I discovered that my external drive was not mounted when I did that. So those movies went somewhere onto my internal drive instead. So, I quit iTunes, plugged in the external drive, and then restarted iTunes while holding option. I chose what had been the appropriate iTunes folder (iTunes Media) from the external drive, but now I get the error message that says there is no Library file. I'm typically pretty good at trouble-shooting my own problems, but iTunes gets me every time. What have these operations done, and can I undo them? Thanks in advance PJ EDIT: Yeah, I dug around in the forum for a day before posting. There's no lack of iTunes library related threads.