QNAP REXP-1600U-RP, 32 TB, HDD, 2.5/3.5", Rack (3U), Black QNAP REXP-1600U-RP. Total installed storage capacity: 32 TB, Installed storage drive type: HDD, Storage drive size: 2.5/3.5". Chassis type: Rack (3U), Device class: Small & Medium Business. Number of storage drives supported: 16, Supported storage drive types: HDD & SSD, Supported storage drive interfaces: SAS, Serial ATA II, Serial ATA III, Storage drive sizes supported: 3.5,2.5". Width: 17.4" (442.4 mm), Depth: 20.8" (528.3 mm), Height: 5.12" (130 mm). Product color: Black