This product is either discontinued or we cannot get that from suppliers.
QNAP TS-128A Single Bay Diskless NAS, Realtek RTD1295 Quad-core 1.4GHz ARM processor, 1 GB DDR4, not expandable, 4GB eMMC Flash, 1 x 3.5 inch SATA 6Gbps Drive Bay, Type A USB; 1 x USB 3.1 Gen1 (Front); 2 x USB 2.0 (Rear).
Equipped with a Realtek RTD1295 quad-core processor, the TS-128A provides home users with powerful features including snapshot-based backup, file synchronization, and private cloud services.