NAS QNAP 453E 4-Bay, CPU Intel Celeron J6412 4-core 4-thread processor, burst up to 2.6 GHz, RAM 8 GB DDR4 onboard not expandable, HDD 2.5 3.5 SATA 6Gb s, 3Gb s (neincluse), LAN: 2 x 2.5GbE, USB