Best Value Turn-Key NAS (Plug-and-Play):
QNAP TS-464
Why it's great: Best balance of performance, expandability, and value. *Hot-swap supported.
Drives: 4x SATA 3.5"/2.5" bays (hot-swappable)
CPU: Intel Celeron N5105 Quad-core
RAM: 4GB DDR4 (upgradeable)
Network: 2x 2.5GbE LAN
Expansion: PCIe slot for 10GbE or NVMe cache card
Price: ~$1,100 *4 x 4TB HDD's