The N2200xxx is a two bay NAS for home use, NAS N4200 NAS for home use and SMB’s. Both are running Atom D525 dual-core processors @ 1.8GHz with one GB or DDR3 RAM. Both can use 3T HDD’s as well as EXT 4 file systems. The drives have convenient access in the front or side and the N4200 has an LCD display for setting features and perimeters for the NAS. Most features are accessible through the proprietary UI, with special features for photo servers, iPhone and android connectivity. All are good for backup (includes RAID features). The 4200Pro has a built in UPS for added security of data.