Integrating a Blu-ray drive into a NAS box chassis is akin to mounting a rocket engine to the bed of a pickup truck: It looks impressive, but it doesn’t make a whole lot of sense. So it is with LG’s N4B2ND4 NAS box (or the model N4B2N, if you don’t want the four 1TB Hitachi hard drives). The Blu-ray drive—and the drop-dead gorgeous enclosure—set the product apart from the competition, but neither feature adds sufficient value to justify the lofty price tag.A dual-layer disc with 50GB of free space for the burnin’ is a great accessory—but not when it’s attached to a network-attached storage device. Is it an issue of backing up critical files?  Well, the N4B2ND4 supports RAID 0, 1, 5, 1+0, or JBOD, which should give you plenty of options to balance your speed and data-redundancy needs. And while it’s true that a dual-layer Blu-ray disc delivers 50GB of storage capacity per disc, it would cost a small fortune to back up terabytes of data onto media that costs $35 a piece.