QNAP TX-500P, 20 TB, HDD, 11.2 lbs (5.1 kg), Tower, Black QNAP TX-500P. Total installed storage capacity: 20 TB, Installed storage drive type: HDD. Chassis type: Tower, Device class: Small & Medium Business. Number of storage drives supported: 5, Supported storage drive types: HDD & SSD, Supported storage drive interfaces: Serial ATA II, Serial ATA III, Storage drive sizes supported: 2.5,3.5". Width: 8.29" (210.6 mm), Depth: 9.27" (235.4 mm), Height: 7.29" (185.2 mm), Weight: 11.2 lbs (5.1 kg). Product color: Black