Features 2 x 4TB 7200 rpm 3.5' HDDs 2 x 3.5' Drive Bays 2 x Thunderbolt 3 (USB-C) Interfaces RAID 0, 1, JBOD & SPAN Read Speeds up to 550 MB/s 1 x Quiet Cooling Fan Built-In Hub with Card Readers Mac Compatible & Time Machine Ready Compatible with Windows After Reformat