QNAP TL-R400S, HDD/SSD enclosure, 2.5/3.5", Serial ATA III, 6 Gbit/s, Hot-swap, Black, Gray QNAP TL-R400S. Product type: HDD/SSD enclosure. Number of storage drives supported: 8, Storage drive size: 2.5/3.5", Supported storage drive interfaces: Serial ATA III. Data transfer rate: 6 Gbit/s. Installed storage drive type: HDD, Total installed storage capacity: 56 TB, Hot-swap. Rack mounting, Rack capacity: 1U, Product color: Black, Gray