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    TERRAMASTER D4-320 External Hard Drive Enclosure - 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

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    • 4 Bay D4-320 USB 3.2
    • 9 Bay D9-320 USB 3.2
    • 2 Bay D2-320 USB 3.2
    • The D4-320 hard drive enclosure supports high-speed data transmission up to 10Gbps using the USB 3.2 Gen2 protocol and is compatible with various hard drives, including SATA hard drives and SSDs.
    • The D4-320 USB storage is plug-and-play compatible with MAC, Windows, and Linux operating systems and supports 4 individual disks without RAID function.
    • The D4-320 HDD enclosure supports hot swapping for easy hard disk replacement without powering off the device.
    • The D4-320 external HDD enclosure features a tool-free hard drive tray design and TerraMaster's unique Push-lock design for secure installation and removal of hard drives.
    • The D4-320 direct attached storage incorporates an intelligent temperature-controlled fan for optimal heat dissipation and specialized sound-absorbing panels and vibration damping measures for quieter operation.
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    Overview
    Specs
    Reviews (13)
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    Any questions? Ask CelesteSM will help you find out quickly.

    D4-320 vs D4-300

    Note: Some mini PCs may have weaker USB signal output, which can cause random interruptions during file read/write operations during data transmission. 

    When this occurs, it is recommended to 1) use the rear USB ports of the computer, as they typically provide a more stable signal; 2) test the device on another known-good computer to rule out hardware issues on the original PC; and 3) use a 10Gbps USB-A/USB-C hub or splitter with a short 0.3m-0.5m cable to reduce signal loss.

    Products
    Drive Bays 4 6 2 Bays + 3 x M.2 NVMe Slots 4 Bays + 4 x M.2 NVMe Slots
    Interface USB3.2 10Gpbs Type C USB3.2 10Gpbs Type C USB3.2 10Gpbs Type C USB3.2 10Gpbs Type C
    Max. number of HDDs/SSDs 4 x 2.5" or 3.5" SATA 6Gb/s 6 x 2.5" or 3.5" SATA 6Gb/s 2 x SATA HDD/SSD; 3 x M.2 SSD 4 x SATA HDD/SSD; 4 x M.2 SSD
    Max. Storage 120TB (30TB x 4) 180TB (30TB x 6) 84TB (30TB x 2 + 8TB x 3) 152TB (30TB x 4 + 8TB x 4)
    Reading Speed (max.) 1025MB/s (4 SSD, Single Disk) 1030MB/s (6 SSD, Single Disk) 980MB/s (1 NVMe SSD, Single) 980MB/s (1 NVMe SSD, Single)
    Writing Speed (max.) 1016MB/s (4 SSD, Single Disk) 1005MB/s (6 SSD, Single Disk) 866MB/s (1 NVMe SSD, Single) 866MB/s (1 NVMe SSD, Single)
    RAID Mode NO RAID NO RAID HDD1&2 - RAID 0/1/Single/JBOD NO RAID
    RAID Features NO RAID, only Individual disks NO RAID, only Individual disks 2 + 3 RAID mode NO RAID, only Individual disks
    RAID Auto-rebuilding NO NO RAID1 NO
    Push-Lock Tray
    TERRAMASTER D4-320 External Hard Drive Enclosure - 4bay USB 3.2 Gen2 10Gbps Type-C USB Storage Hot Swappable Plug and Play (Diskless)

    Warranty & Returns

    Warranty, Returns, And Additional Information

    Warranty

    • Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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    The TERRAMASTER D4-320 is a diskless, four-bay USB-C storage enclosure for Windows, Mac, and Linux users who want to connect up to four SATA drives directly to a computer, with USB 3.2 Gen 2 speeds up to 10Gbps and support for individual disks rather than built-in RAID.

    Recommended For

    • Desktop users who need to add several SATA drives for local storage, with each drive exposed individually over USB rather than combined into a hardware RAID array.
    • Home-server and Unraid users who want to attach additional drives directly to a computer and manage storage or any software RAID on the host.
    • Photographers and video editors who work at a computer and need multiple local drives for project files, media libraries, or on-site transfers.
    • Users reusing or swapping SATA HDDs and SSDs who value individual drive access and tool-free trays for changing drives at a desk.

    Spec Summary

    AttributeValue
    Best ForDiskless four-drive external storage expansion for Windows, Mac, and Linux systems over USB Type-C
    Drive Support And CapacityFour bays, supporting up to 32 TB per bay and 128 TB total; 0 GB of storage included
    Drive Form Factor3.5-inch hard drives
    Interface And Transfer RateUSB Type-C with USB 3.2 Gen 2 connectivity and data transfer rates up to 10 Gbps; SATA 6.0 Gb/s interface support
    Power72 W power; AC adapter supports 100–240 V AC
    CoolingSmart fan
    Dimensions And Weight8.74 × 7.05 × 6.06 inches; net weight 1.9 kg
    Color And ConstructionBlack plastic enclosure
    Included AccessoriesHost unit, power adapter and cord, 0.8 m USB-C cable, quick installation guide, screws, and limited warranty note
    Model IdentifiersTerraMaster External Hard Drive Enclosure, model D4-320