I have a Mac Air that's a couple of years old. Lately I get message saying something like "start up disk almost full". My computer also seems more sluggish these days. Storage indicates I have about 5 gb of 120 gb still free. Apparently most of my storage is being used by music, at 58 GB, and movies at 11 gb takes up some space too, even though I don't believe I actually have any movies, so not sure what this. My questions are as follows: 1) Should I get my music off my computer, and if so, where do I keep it safe? I have several thousand songs that I've collected from different sources over the years and don't want to risk losing them. I guess they are stored on itunes, and/or google music? I'm not really sure. (I actually don't listen to music all that much if that matters here.) 2) If I do get my music off my computer, will that make my computer work better? I know little about this stuff or computers in general, so any help would be greatly appreciated. Thanks!