Four :More than level in appearance,performance is stronger Check the disk temperature in real time Ifthetemperature is lower than 65 :it isnormal.lfthe temperature is higher than65.pay attention to HDD/SSD heat Intelligent Display:Escort data security,Open a new erea of visual controllable Intelligent No-Drive Adapt Multiple Systems Free installation driver, strong compatibility, widely compatible with for Win, for , for Android and other systems External Interface:USB Internal Interface:SATA Colour:B:Black Material:ABS+PC Package Contents: 1 x HDD Case 1 x data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.