public void LoadExternalEmail(PhysicalDisk physicalDisk)
        {
            if (curMode == Mode.SOLVER)
            {
                return;
            }

            disketteInsert.Play();

            curMode     = Mode.EXTERNAL_EMAIL;
            diskInDrive = physicalDisk;
            SetActiveScreen(emailView.gameObject);
            emailView.LoadExternalEmail(physicalDisk.diskData);
        }