Case of very good quality, essential for external hard drives 2 1/2 "that are a little more fragile than 3" 1/2, but so much more practical (no 220V power supply required). We must permanently keep the disc set in its case: a strip falls on hard ground is usually fatal. Housing provided for the USB cable. This case is too small for disk 3 "1/2 (it would be good to specify)