Holiday Shipping Details & Extended Holiday Returns 
About TerraMaster
- TerraMaster - a 16-year-old professional brand focusing on developing and producing storage products
- Products include network attached storage (NAS), direct attached storage (DAS) and thunderbolt 3 storage.
- With the core competitiveness in excellent hardware design and strong software developing ability, TerraMaster products are well known among customers with the great reliability and value.
Up to 80TB capacity with up to 410MB/s sequential read speed
- The D4-300 is desktop storage with massive capacity ideal for storing photos, videos, documents and music. Super-fast performance with up to 410MB/s sequential read speeds and up to 80TB capacity.
Cross-Platform Compatibility for Data Backup
- Use D4-300 to easily backup computer files, compatible with Windows, Mac, and Linux machines. No drivers needed!
- This is NOT a NAS, it is a DAS and does NOT support RAID.
Real Super Speed with USB3.1(Gen1) Transport Protocol
- Powerful hardware with the latest USB3.1(Gen1) Type C connector.
- Equipped with the latest USB Type-C interface, running USB 3.1 Gen 1 protocol. Testing with Samsung 850 evo 250GB SSD, the actual data transmission speed is up to 369.5MB/s(write) and 417.8MB/s(read).
- All Aluminum-alloy shell and a low-noise fan.
Expand the capacity of your NAS
The D4-300 can quickly add storage space to your NAS. It can be used as an external hardware RAID device for TerraMaster NAS. The D4-300 features USB3.1 connection and supports SSD/HDD drives for high-speed data access and massive capacity.
Better Protection
The D4-300 features an intelligent temperature control system and incorporates a low noise fan. The fan speed is automatically adjusted with the temperature of the hard drive to ensure that your hard drive remains at the optimal working temperature.
USB 3.1 Type-C High-speed Interface
- Relying on the USB 3.1 Gen 1 super speed protocol, the D4-300's transmission speeds can reach up to 410MB/s (Testing with Samsung 850 evo 250GB SSD).
- The D4-300 adopts the latest USB Type-C interface,Includes a Type C to Type-A cable.
Multi-Drive Compatibility
- Compatible with diverse 3.5-inch SATA hard drive brands and models, as well as with 2.5-inch SATA hard drives and SSDs. Equipped with 4 drive slots, supports a drive capacity of up to 20TB, and a total storage capacity of up to 80TB (Users need to purchase their own hard drives).
- With exclusive energy-saving technology, the D4-300 automatically enters sleep mode, along with your computer, to save energy and extend the life of your drives.
Brand new replacement for 2 year
- Brand new replacement for 2 years.
- Quick service in 24 hours!
Better Protection
- The D4-300 features an intelligent temperature control system and incorporates a low noise fan.
- The fan speed is automatically adjusted with the temperature of the hard drive to ensure that your hard drive remains at the optimal working temperature.
| Products | |||||
|---|---|---|---|---|---|
| Drive Bays | 2 | 4 | 5 | 5 | 6 |
| Interface | USB3.1 Gen1 Type C (5Gbps) | USB3.1 Gen1 Type C (5Gbps) | USB3.1 Gen1 Type C (5Gbps) | USB3.1 Gen1 Type C (5Gbps) | USB3.2 10Gpbs Type C |
| Max. number of HDDs/SSDs | 2 x 2.5" or 3.5" SATA 6Gb/s | 4 x 2.5" or 3.5" SATA 6Gb/s | 5 x 2.5" or 3.5" SATA 6Gb/s | 5 x 2.5" or 3.5" SATA 6Gb/s | 6 x 2.5" or 3.5" SATA 6Gb/s |
| Max. Storage | 40TB (20TB x 2) | 80TB (20TB x 4) | 100TB (20TB x 5) | 100TB (20TB x 5) | 120TB (20TB x 6) |
| Reading Speed (max.) | 410MB/sec (tested by 2 SSD, in raid 0, Windows OS) | 420MB/sec (tested by 4 SSD, in SingleDisk) | 410MB/sec (tested by 2 SSD, in raid 0, Windows OS) | 210MB/sec (tested by 5 SSD, in raid 0, Windows OS) | 1030MB/s (6 SSD, Single Disk) |
| Writing Speed (max.) | 400MB/sec (tested by 2 SSD, in raid 0, Windows OS) | 390MB/sec (tested by 4 SSD, in SingleDisk) | 400MB/sec (tested by 2 SSD, in raid 0, Windows OS) | 190MB/sec (tested by 5 SSD, in raid 0, Windows OS) | 1005MB/s (6 SSD, Single Disk) |
| Hardware RAID | YES | NO | YES | YES | NO |
| RAID Mode | RAID 0, 1, JBOD, Single | NO | RAID 0, 1, Single | RAID 0, RAID 1, RAID 5, RAID 10, CLONE, JBOD, and Single Disk | NO |
| RAID Features | RAID 0, 1, JBOD, Single for HDD1 & HDD2 | NO RAID, only Individual disks | HDD1 & HDD2 can be set as RAID 0, 1, Single; HDD3-5 can be individual disks | RAID 0, RAID 1, RAID 5, RAID 10, CLONE, JBOD, and Single Disk | NO RAID, only Individual disks |
| RAID Auto-rebuilding | RAID1 | NO | RAID1 | RAID1, RAID5, RAID10 | NO |
