Eight universal 3.5/2.5-inch Drive Bays use SATA/SAS and U.2/M.2 NVMe drives for up to 144TB of capacity and real-world speeds up to 2750MB/s. The top four bays can utilize U.2 SSDs Convenient front mounted USB-C and (2) USB-A 10Gb/s ports for peripherals and mobile devices. Frontside SD 4.0 and CFexpress card readers with up to 985MB/s speed Future ready: top four bays can use U.2 SSDs the emerging M & E industry storage standard PCIe x16 connector/x4 lane slot for audio/video capture networking SSD storage hardware RAID card or I/O card Create manage and monitor advanced RAID sets with SoftRAID the world's most advanced RAID management solution with easy setup e-notifications and drive integrity monitoring. (RAID 4/5/1+0 (10) is available for Mac only at this time.)