Hello, as I am about to be buying a 256GB MacBook Pro I wondered how, exactly, moving your Photos and iTunes Library to an external SSD works. I do not want to only backup to the SSD but rather use the library from there while plugged in, moving the default location for the library to the external SSD. I know this is possible, but I am concerned about the case of loss or theft. Are the libraries on the SSD encrypted? Can I backup the content of the SSD via time machine to my stationary home harddrive? Thank you very much in advance for any help.