This product is either discontinued or we cannot get that from suppliers.
QNAP TS-328 3-Bay Diskless NAS, Realtek Quad-core ARM CortexA53 (64-bit), RTD 1296, 1.4GHz, 2GB DDR4, 4GB eMMC, Drive Bays Hot-swap 3 x 3.5"/2.5" SATA 6Gb/s HDD/SSDs (bundled one 2.5" tray base for installing 2.5" HDD/SSD), 2x Gigabit RJ-45, 2 x USB 3.0 (1 x Front); 1 x USB 2.0 (Rear), 1 x 3.5mm line out jack.
Qnap Ts321 Turbo Nas - Arm Quad-Core 1.4 GHz Processor Network Storage (TS-328) is powered by a Realtek RTD1296 quad-core 1.4 GHz processor with 2GB DDR4 memory.