I purchased this item from Amazon, but never had a need for it, so am offering it for sale.From the Manufacturer:
The Iron Man in RAID Storage Unit, UASP protocol supported.
Noontec-TerraMaster D4-310 4-bay DAS unit adopts an aluminum-ally shell and a low-noise fan, solid and reliable with good heat dissipation and low noise.
Removable hard drive tray, easy to install hard drives and hot swap supported.
Low temperature and noise with the smart temperature controlled fan.
Supports 2 sets of RAID's in one unit, with slots 1&2 being one set of RAID, and slots 3&4 another set of RAID.
Equipped with two USB 3.0 high-speed HUB ports which extend more USB interfaces for your computer.
Real Super Speed with USB3.0 Transport Protocol
Powerful hardware with the latest USB3.0 Type C connector.
The actual transfer speed can reaches as high as 410MB/s for SSHD or SSD.
Absolute Data Security
Can install four either 2.5 or 3.5 inch SATA or SSD drives. Compatible with 3.5 inch SATA drives up to 10TB, and a maximum total capacity of 2 sets of 20TB. Store your family photos, video and more data in the D4-310 for security.
Can configure your drives in RAID 0, RAID 1, JBOD or Single Disk modes. This allows you to configure the unit to meet your unique needs for data security, blazing performance or maximum storage capacity. Changing hard drives is easy with our dedicated drive trays and hot swap capability.
A Variety of Backup Methods
Supports Apple Time Machine to easily back up the data in your Mac.
Supports windows backup software to back up the data in your designated DAS device.
Superspeed USB3.0 interface supports external storage backup
What's inside the package:
D4-310 device * 1
Power adapter * 1
Power cord * 1
USB type C - A cable * 1
Quick guide *