QNAP TS-421, Tower, Marvell, 1 GB, DDR3, 0 TB, QNAP Turbo System QNAP TS-421. Chassis type: Tower. Processor family: Marvell, Processor frequency: 2 GHz. Internal memory: 1 GB, Internal memory type: DDR3. Total installed storage capacity: 0 TB. Operating system installed: QNAP Turbo System https://www.techadvisor.co.uk/review/qnap-ts-421-review-3493737/ If it's affordable four-bay NAS storage you seek, QNAP has two new models to add to your shortlist. The QNAP TS-420 and TS-421 take the familiar and sturdy QNAP metal chassis, with only minimal trimming in internal specifications to hit budget. (See Group... The QNAP TS-421 has broad reach across a number of services beside local network file serving, with powerful small-business services as well as plenty of potential for home multimedia hosting. Available for less than £400, this well-made four-bay NAS unit... https://hexus.net/tech/reviews/storage/55313-qnap-ts-421/ The perfect NAS has to have the right blend of hardware and software. After all, anyone can pick up the essential hardware components and build a server of their own. So it's up to NAS manufacturers to stay ahead of the game in the software department wit...