Specifications side by side
TerraMaster D4-320 vs TerraMaster D6-320
Compare the enclosure, then check the cost and compatibility of its drives.
TerraMaster D4-320
Four SATA bays on one USB connection. Useful for a computer that manages each disk or its own software storage pool.
TerraMaster D6-320
Six SATA bays for a host-managed storage setup. The attached computer must provide file sharing, RAID and backup software.
| Specification | D4-320 | D6-320 |
|---|---|---|
| SATA bays | 4 | 6 |
| NVMe slots | 0 | 0 |
| Connection | USB-C 10Gbps | USB-C 10Gbps |
| Drive format | 3.5-inch SATA HDD / 2.5-inch SATA SSD | 3.5-inch SATA HDD / 2.5-inch SATA SSD |
| Included storage | Diskless; drives sold separately | Diskless; drives sold separately |
| RAID | No hardware RAID; independent disks | No hardware RAID; independent disks |
| System | Requires a connected computer | Requires a connected computer |
D4-320 buying checks
- The enclosure does not provide RAID; software RAID requires host OS support.
Reviewed 2026-09-13. Manufacturer specifications
D6-320 buying checks
- No built-in RAID or Ethernet server. Six drives share a single USB connection.
Reviewed 2026-09-13. Manufacturer specifications
Highlighted rows differ. Manufacturer specifications are not benchmark results or a reliability ranking. Network and USB ratings describe the connection; actual transfer speed depends on the host, drives and workload.
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