Its the mixApart from the improved design, the advantage of the IB-3740-C31 is that it can support 2.5\" and 3.5\" drives. This makes the device an ideal candidate for users looking for the maximum amount of direct-attached storage space since traditional spinning disks can accommodate a significantly larger amount of data than the largest solid-state drives. If youre looking to eke out maximum performance, however, youll want to use 2.5\" SSDs instead.For the environmentWhen the host device is not being used or if the data transfer cable is not connected the IB-3740-C31 turns itself into standby mode automatically. In addition, each drive bay has an LED indicator in order to provide information regarding HDD activity (read/write), fan settings, and sync status.Fast data transferThe connection between the host PC and the external enclosure is realized by a USB 3.1 Type-C port. Thanks to the USB 3.1 (Gen 2) protocol a high data transfer rate of up to 10 Gbit/s can be achieved.Specification:- Model: IB-3740-C31- Article No.: 60360- EAN Code: 4250078167044- Brand: ICY BOX- Category: External cases- Material: Aluminium / plastic- Colour: Black- HDD size: 2,5\" or 3.5\"- HDD interface: 4x 2,5\"/3,5\" SATA I, II, III- HDD capacity: Up to 10 TB/each- Transfer rate: SATA up to 6 Gbit/s- External data interface: 1x USB 3.1 (Gen 2) Type-C- Operating system: Windows, macOS- Power connector: Internal, AC 100-240 V, 1.6 A, 50-60 Hz; DC 12 V, 5 A, 60 W