QNAP UX-1200U-RP, 72 TB, HDD, Serial ATA III, 2.5/3.5", Rack (2U), Black QNAP UX-1200U-RP. Total installed storage capacity: 72 TB, Installed storage drive type: HDD, Storage drive interface: Serial ATA III, Storage drive size: 2.5/3.5". Chassis type: Rack (2U), Device class: Small & Medium Business. Number of storage drives supported: 12, Supported storage drive types: HDD & SSD. Width: 19" (482 mm), Depth: 21" (534 mm), Height: 3.5" (89 mm). Product color: Black