4 bay nas memory capacity 12 tb number of installed hard drives 4 max hard drives 4 memory capacity per hard drive 3 tb hard drive mountings click removable drive internal interface sata ii target audiences small office home office soho small and medium sized businesses smbs raid levels 0 1 5 6 10 jbod networking gigabit 101001000 connections 2x usb 20 2x usb 30 1x rs 232 2x rj 45 case tower processor marvell armada xp mv78230 clock speed