Asustor
Asustor Drivestor 4 AS1104T - 4 Bay NAS, 1.4GHz Quad Core, Single 2.5GbE Port, 1GB RAM DDR4, Network Attached Storage, Personal Private Cloud (Diskless)
TERRAMASTER
TerraMaster D4-300 USB 3.0 Type-C Storage Tool-Free External Hard Drive Enclosure Hot Swappable (Diskless)
QNAP
QNAP TS-433-4G-US 4 Bay NAS with Quad-core Processor, 4 GB DDR4 RAM and 2.5GbE Network (Diskless)
QNAP
QNAP TR-004 4 BAY Direct Attached Storage with Hardware Raid