ThunderBay 4, OWC's flagship 4-bay RAID powerhouse is bigger and faster than ever before. Now with the unbelievable performance of Thunderbolt 3 up to 1550MB/s sustained performance1it'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.
Two Thunderbolt 3 ports
Up to 1550MB/s sustained performance
Four hot-swappable universal drive bays: mix or match 2.5-inch (no adapter needed) and 3.5-inch HDDs and SSDs
Dedicated DisplayPort 1.2 port
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. ThunderBay 4 is highly configurable to perfectly match your performance needs. Choose between traditional hard drives or Solid State Drives. 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 solution 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.
4 drive bays plus so much more.
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.
ThunderBay 4's drive isolating design reduces sonic resonance, and is aided by over-sized, rugged, vibration-absorbing, non-skid feet.
DisplayPort 1.2 Support
Dual Thunderbolt 3 ports let you connect the display of your choice that your computer can support, including 4K displays.
OWC Thunderbolt 3 Cable
ThunderBay 4 comes with a certified OWC Thunderbolt 3 cable.
More Powerful With SoftRAID
Need more power and protection? Choose a solution that includes OWC's powerful SoftRAID RAID software.
SoftRAID is the most powerful, intuitive software RAID utility on the market. Multiple RAID levels let you select the RAID level that fits you or your project’s needs best. If you need maximum volume capacity, optimum drive performance, data protection, or a combination of attributes, SoftRAID has you covered.
Packed with features like drive validation, verification and failure prediction—SoftRAID includes features you simply don’t get with hardware RAID. It’s like having a datacenter on your desktop! From home users looking to protect photos and documents to professionals needing to protect and quickly access projects, SoftRAID is the perfect solution. Learn more about the power of SoftRAID XT.
Try SoftRAID COMPLETELY FREE for 14 Days
Start protecting yourself and your data today! Get all of SoftRAID's great disk checking and monitoring features, plus the fastest and most efficient software RAID there is. Download and try SoftRAID for FREE.
Backed by OWC
You can rely on OWC's award-winning support for the ThunderBay 4 solution. Plus, ThunderBay 4 comes with an OWC Limited Warranty.
Sustained read speeds, dependent on mechanism installed.
SoftRAID XT works with macOS 10.12 or later and Windows 10. Intel-based Macs require macOS 10.12 or later. M1 Macs require macOS 11.1 or 11.3 and later. macOS 11.3 is currently available as a public beta. SoftRAID is licensed per computer. The SoftRAID serial number will work with both Mac and Windows but can only be active on one computer at a time. Additional seats can be purchased. RAID 4/5/1+0 (10) are currently Mac only at this time.
Four (4) 2.5-inch or 3.5-inch SATA drives
Hot Swap Support
SATA Controller: (2) ASM1062
Thunderbolt 3: (1) Intel DSL6540
Data Transfer Rate (Maximum)
Thunderbolt 3 : 40 Gb/s (or 5000 MB/s)
Plug and Play
RAID Levels Supported
Mac OS Compatibility
macOS 10.12 Sierra
macOS 10.13 High Sierra
macOS 10.14 Mojave
macOS 10.15 Catalina
macOS 11.1 Big Sur
PC OS Compatibility
Windows 10 64-bit Edition
SoftRAID XT works with macOS 10.12 or later and Windows 10. Intel-based Macs require macOS 10.12 or later. M1 Macs require macOS 11.1 or 11.3 and later. macOS 11.3 is currently available as a public beta.
Internal UL-listed universal auto-switching power supply
External Power Adapter
Number of Bays
(2) Thunderbolt 3 (USB-C) Ports
(1) DisplayPort Port
(1) 92mm Temperature-controlled cooling fan
Height: 17.7 cm (7.0 in)
Length: 24.5 cm (9.6 in)
Width: 13.5 cm (5.3 in)
3.9 kg (8.60 lbs)
Operating: 50°F to 95°F (10°C to 35°C)
Non-Operating: -40°F to 149°F (-40°C to 65°C)
Operating: 8% to 90% non-condensing
Non-Operating: 5% to 95% non-condensing
Manufacturer provided specifications for OWC p/n OWCTB3IVKIT000
Macfixit Australia is an Australian owned and operated business based in Melbourne, Victoria and we've been operating since 2005.
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Our goal is to provide you with a consistently superior customer experience—whether at the initial purchase, during the shipping of your product and during the course of usage of your product. The Customer Guarantee lets you know what you can and should expect from Macfixit Australia —and what we’re doing to hold ourselves accountable every day.
We make the following guarantees:
1. We will give you a 30-day, money-back guarantee on all our products. This means you can test drive the product in the convenience of your home. This is of course in addition to the standard manufacturer replacement warranties.
If your order contains a faulty product or a product incorrectly sent, we will of course take back the product and refund your money or send you a replacement product.
If you’re not satisfied and wish to return a product for any other reason, you can do so in the first 30 days and get your money back. Simply return all items in good working order and in undamaged original packaging and we’ll refund the cost of the product.
2. We will treat you with courtesy and respect.
3. We will answer your questions at your convenience.
4. We will quickly address any problem you experience.
You can contact us regarding any order/product related issue by calling 03 9329 4343 or emailing us via our online Contact Us page
If you experience a faulty product or an item that has been incorrectly supplied, we promise to rectify the issue as quickly as possible.
Every Macfixit Australia employee is dedicated to meeting the commitments above and to exceeding your expectations. We are working very hard to serve you better and listen carefully to your feedback. If you have any thoughts or ideas about this Guarantee or about your experience with us, we invite you to share them with us by sending us an e-mail. We take all feedback very seriously.