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  • OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)
  • OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)
  • OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)
  • OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)
  • OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)
SKU: P19631
Availability: Sold Out

OWC ThunderBay 4 4TB Four-Bay Thunderbolt 3 (4 x 1TB)

48 payments of per month. Learn more
  • Vendor: OWC
  • Product Type: Storage
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All New Design for Power and Performance

ThunderBay 4, OWC's flagship 4-bay RAID ready powerhouse is bigger and faster than ever before. Now with the unbelievable performance of Thunderbolt 3 — up to 1527MB/s sustained performance1 — it's the ultimate workhorse external storage solution.

Not only faster, the new ThunderBay 4 Thunderbolt 3 is now natively compatible with both 2.5" and 3.5" drives, and with a redesigned chassis, it's even cooler and quieter too. Add vast amounts of high-performance storage with ThunderBay 4.

Utilize each of the four internal drives independently, or use the software RAID of your choice to setup a multi-drive array for high performance or data redundancy.

Edit, Experiment, Create, Design

Designed with performance in mind and engineered to harness the power of Thunderbolt 3, ThunderBay 4 is an incredibly flexible external solution with the throughput to support multi-stream compressed 4K video and other bandwidth-intensive operations.

Highly configurable to perfectly match your performance needs. Use each drive independently, or in the RAID configuration of your choice for the optimal balance of performance and data-redundancy. Get the most out of your storage, take the brakes off your workflow, and do more with a ThunderBay 4.

Certified and Tested

Each ThunderBay 4 undergoes OWC's multi-hour drive "burn-in" performance certification procedure prior to shipping. This ensures your ThunderBay 4 arrives operating properly, ready for demanding use.


  • Two Thunderbolt 3 ports
  • Dedicated DisplayPort 1.2 port
  • Up to 1527MB/s sustained performance
  • Works with 3.5" or 2.5" drives — no adapter needed
  • Ultra quiet, heat dissipating aluminum chassis
  • Rigorously pre-tested with multi-hour burn-in
  • Plug and play RAID Ready

Time-Tested Cooling

Built on OWC's time-tested enclosure cooling technology, ThunderBay 4 utilizes an open "flow-thru" vented design with an oversized 92 mm, low-turbulence, noise-quieting fan to keep the drives running cool and reliably.


Daisy-chain up to six ThunderBay 4s for massive storage capabilities and increased performance, or connect multiple ThunderBay 4s to multiple Thunderbolt 3 ports to achieve exponential speed capabilities.

Vibration Dampened

ThunderBay 4's drive isolating design reduces sonic resonance, and is aided by over-sized, rugged, vibration-absorbing, non-skid feet.

DisplayPort 1.2

Dual Thunderbolt ports let you connect the display of your choice that your computer can support, including 4K displays.

Thunderbolt Cable

ThunderBay 4 comes with a certified OWC Thunderbolt 3 cable, with other lengths from 0.5 meter to 2.0 meters available separately.

Interface Thunderbolt 3
Ports 2 x Thunderbolt 3 (USB Type-C) female ports
1 x DisplayPort 1.2 female port
Drive Bays 4 x 2.5/3.5" SATA 6Gb/s hard drive bays
Installed Hard Drives 4 x 1 TB 3.5" 7200 rpm HDDs
Total Storage Capacity 4 TB
RAID / JBOD Support
  • JBOD: Utilize each of the four drives independently
  • RAID: Use any Software RAID of your choice to setup the ThunderBay 4 for multi-drive performance or data redundancy
  • Includes SoftRAID Lite with support for RAID 0 and 1. Upgrade option for RAID 4, 5, 1+0 capability
  • Initial Configuration RAID 0
    Read Speed Up to 1527 MB/s
    Write Speed Not specified by manufacturer
    Kensington Lock Support Yes
    LED Indicators
  • Power
  • Disk activity
  • Operating System Requirements macOS Sierra 10.12.2 or later
    Windows 10 or later
    System Requirements Mac or Windows computer with a Thunderbolt 3 interface
    (Mac or Windows computer with a Thunderbolt 2 interface is supported, but it requires a certified Thunderbolt 3 to Thunderbolt 2 adapter, which is not included and is sold separately)
    Power AC input: 100 to 230 V
    Temperature Operating
    50 to 95°F / 10 to 35°C
    -40 to 149°F / -40 to 65°C
    Dimensions 5.3 x 7.0 x 9.6" / 135 x 177 x 245 mm
    Weight 12.6 lbs / 5.7 kg
    • OWC / Other World Computing ThunderBay 4 4TB Four-Bay Thunderbolt 3 RAID 0 Array (4 x 1TB)
    • Thunderbolt 3 Cable (6.6')
    • External Power Cable
    • 2 x Security Keys
    • SoftRAID Lite
    • Utility Software Bundle

    Limited 3-Year Warranty