This product is either discontinued or we cannot get that from suppliers.
QNAP TS-451+-2G Network Storage, CPU Quad-core Intel® Celeron® 2.0GHz (burst up to 2.42GHz), 2GB DDR3L RAM (1 x 2GB), Total memory slots 2 SODIMM, Expandable up to 8 GB, Flash Memory 512MB, Expansion Unit Max. 1 (UX-800P, UX-500P), Gigabit LAN Ports-2, LED Power/Status, LAN, USB, HDD1-4.
Facing the increasing demand for data storage, sharing and multimedia processing, more and more users are looking for a NAS system with good performance and an affordable price tag.