To move your itunes library to another storage device, you need to know if the itunes manage your library or no. if it supports, then you need to follow a small procedure. First you need to go to edit option in the toolbar. Then you need to go to the references. Then click on the advanced option. Then click on to general option. Then you have to click on to the change option and thereafter, you have to select a new patch where you need to save your files. After all this, you have to quit your itunes then open the itunes music folder. Then you just have to open the itunes music folder and select all the data that is there and then copy to the new location. Now after all this, restart your itunes and you find your itunes already found in there.