I've just converted an old Snow Leopard partition (used for old Rosetta stuff) to a clean Yosemite partition, and will slowly build up that drive to the point where it can be used as my main setup. I'm thinking about putting LX on it A couple of things about upgrading are unclear to me. First, is there anything in the sound libraries that come with L9 that should be kept when installing LX, or can you just delete it all and download the LX stuff. I have no projects that depend on anything in L9, but is there anything unique, say for EXS24 that should be kept? Second, what is the experience with putting the sample and sound libraries on a different drive from the one that has Logic on it? I've seen both Yea and Nay on this forum. Putting it all on the startup drive is a non starter for me. I currently have all my sound and sample libraries on a separate drive, including that which comes with L9. Is it possible that some sounds, e.g. the EXS24 stuff can go anywhere, while other sounds have to stay where the installer puts them? If a separate drive is workable, is there a link to a reliable means of setting that up?