It's nice to see an attempt at music management in the Express app. I would normally just drag folders and individual files over (like I do for my phone), but I noticed it really doesn't understands compilation albums; I have just picked up a nice cheap CD set and thought I would dump it over before hitting the gym. The app shows all the tracks as one-per-album which isn't right. Once on the watch, they show up correctly under one "album" with no artist in the listing, which is what I expect.