TS-251B on Amazon QNAP TS-251B-2G SOHO Intel dual-core NAS system, PCIe slot, white Seagate IronWolf 4 TB HDD, NAS interne Festplatte (8,9 cm (3,5 Zoll), 5900 U/Min, 64 MB Cache, SATA 6 GB/s, silber) Modellnr.: ST4000VNZ08,