OWC ThunderBay 4 Mini (with SSD)

RAID levels:
RAID 0, 1, 4, 5, 1+0 (10), JBOD
Thunderbolt 3 x 2
Disk ports:
6Gb/s SATA
OS support:
macOS 10.13 or later
Windows 10 or later
SAS expansion:
External Power suply
Bay count:
Transfer speed:
up to 1556MB/s (with SSD`s)
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Please contact us for a delivery time estimates

Product type:
External RAID

Professional Grade 4-Bay 2.5-inch Drive Thunderbolt 3 Storage Solution

With four 2.5-inch drive bays, ThunderBay 4 mini transforms SSDs and HDDs into a pro-grade, Thunderbolt 3 storage solution in a compact design.


  • Retasks/maximizes SSD potential: four 2.5-inch drive bays
  • Pro-grade speeds: up to 1556MB/s with (2) Thunderbolt 3 ports (Thunderbolt 2/Thunderbolt backward compatible)1
  • Fits all needs: add your own drives or choose from pre-configured solutions
  • Daisy-chain expansion: add up to five additional Thunderbolt devices
  • Deployment ready: solutions undergo rigorous multi-hour drive burn-in
  • Whisper quiet: heat dissipating aluminum with 32.5dB cooling fan
  • Quick swaps: drives mount on sliding trays
  • Plug and play: no drivers needed and includes Thunderbolt cable
  • Easy RAID setup: included SoftRAID guides you through every step of creating RAID volumes
  • Thunderbolt certified for Mac and Windows
  • Worry free: up to 3 Year OWC Limited Warranty with 1 Year Level 1 data recovery


The ThunderBay 4 mini is perfect for repurposing or maximizing 2.5-inch SSDs for a compact data storage solution. It’s big on performance and flexibility, yet ThunderBay 4 mini is about the length of a pencil and weighs only 3.1 pounds with SSDs. The rugged heat-dissipating aluminum enclosure features two Thunderbolt 3 (Thunderbolt 2/Thunderbolt backward compatible)1 for up to 1556MB/s speeds, so you have more than enough bandwidth to handle personal and business backups — all the way up to today's highest resolution audio, photo, and video formats. If you are seeking big RAID performance that's small enough to fit on a desk, in a rack, or on a DIT cart, your wish is now a reality.


With four drive bays, you can mix or match different brand and capacity 2.5-inch SSDs and HDDs. Use mixed drives independently or combine drives as a RAID with the included SoftRAID setup and management software. Available in a variety of pre-configured capacity solutions to achieve your desired balance of storage, performance, and data redundancy.

Whatever the day or project demands, the ThunderBay 4 mini is the perfect workflow solution:

  • Expand production capabilities in industry-leading creative platforms like Final Cut X, Avid Pro Tools, Apple Pro Logic, and Adobe Lightroom
  • Edit large images
  • Manage massive photo and audio libraries
  • Store drone videos
  • Use it as a transport drive


With the ability to daisy-chain you can add up to five additional ThunderBay 4 mini solutions to create massive storage capacities. Merge them with SoftRAID for even more flexibility, capacity, and capability. Or if speed is what you’re after, connect multiple ThunderBay 4 mini solutions to multiple Thunderbolt 3 ports on your Mac or PC to achieve exponential speed capabilities. Beyond storage, the sky is the limit for what you can connect. Attach a 5K Thunderbolt display or two 4K displays. Place a USB 3.1 device at the end of the chain. With an extra Thunderbolt 3 port, you have the flexibility to add to your daisy-chain and master any task at hand. 


Want to access another drive or expand your storage capacity? Simply open the front panel security lock to access the four individual bays. Drives mount to a tray that slides back in and automatically plugs into a drive connector so you can get back to work in minutes.


Now you can maximize disk space, get the fastest access speeds and protect against disk failure with Plug and Play simplicity. SoftRAID’s easy setup makes it a breeze to create RAID volumes by helping you through the entire process. Just decide what you’re using your RAID volume for and how much space to allocate to it. It's that simple to create your preference of speed and/or redundancy attributes of your data volume.

Speed, size, and convenience — the ThunderBay 4 mini provides everything a demanding workflow requires.


  • Up to 86% faster versus AppleRAID
  • ThunderBay 4 mini RAID models – create advanced RAID 0, 1, 4, 5, 1+0 (10) volumes for higher performance and/or redundancy
  • ThunderBay 4 mini RAID-Ready models – create your choice of RAID 0 or RAID 1 for desired speed or redundancy
  • Enterprise-class monitoring for disk and RAID volume health with email notifications
  • Volume validation to ensure sectors can be read, parity is correct, and minimization of volume failure
  • Disk certification checks that your disks are safe to store data on before use
  • Disk failure prediction with early warning helps protect you from sudden disk failure


Like all OWC products, ThunderBay 4 mini is built to the highest ‭standards of reliability and performance and Thunderbolt Certified for Mac and Windows. Because 100% reliability is always the goal, ThunderBay 4 is rigorously quality tested and ‭backed by our 3 Year OWC Limited Warranty plus award-winning, 24/7 customer ‭support.


System Requirements


  • OS
    • macOS 10.13 or later
    • Windows 10 or later


  • Works with any Thunderbolt 3-equipped Mac or Windows PC.1


  • (2) Thunderbolt 3 ports

Drives Supported

  • (4) 2.5-inch SATA HDDs and/or SSDs

Software RAID Modes

  • JBOD/Independent
  • RAID 0, 1, 4, 5, 1+0 (10) via SoftRAID engine


  • External UL-listed, universal auto-switching
  • AC input: 100 ~ 240V, 50-60Hz
  • DC output: 12V, 6A 
  • Total wattage: 72W

Enclosure Dimensions

  • Width: 3.8 in (9.6 cm)
  • Height: 4.6 in (11.7 cm)
  • Depth: 7.5 in (19.1 cm)

Enclosure Weight (empty)

  • 2.5 lb (1.1 kg)

Product Specification Sheet


Environmental (Operating)

  • Temperature (°F) 41°F to 95°F
  • Temperature (°C) 5°C to 35°C

Environmental (Non-Operating)

  • Temperature (°F) -4°F to 140°F
  • Temperature (°C) -20°C to 60°C

Shipping policy

Any items which are in stock, will be dispatched immediately - same day if possible and morning of the following business day at the latest. Items which are not in stock at our local warehouse will be routed to us, and dispatched immediately upon arrival to us. In that case, the estimated dispatch time is noted on the product page.

Note that you are always welcome to email info@dittools.eu or call (+372) 5556 0057 for a more accurate shipping time estimate, as this does vary depending on a number of factors.

Standard shipping

Unless otherwise noted, all items are shipped standard via DPD. We normally ship to European Union countries only – do contact us for possible exceptions, particularly other European mainland countries. Shipping times vary between 1 to 10 business days within Europe – an up to date estimate will be given at checkout.

Express shipping

Our shipping partner for expedited deliveries is DHL Express; please contact us directly for a quote.

Returning an item

If you are not completely satisfied with your purchase, you can return your item(s) for a full refund within 14 days of confirmed delivery.

Special sales, demo items and promotions may have modified return policies. If an item from a bundle is returned for refund, the total bundle discount or the total value of the gifts will get deducted from the returned item prior to issuing a refund. If the bundle discount (or gift value) exceeds the value of the returned item, the difference must be paid to be able to return the item.

Return autorization

If you would like to return any item(s), please contact us by either emailing info@dittools.eu or calling (+372) 5556 0057. We will share with you a Return Merchandise Authorization (RMA) code and ask that you clearly mark this code outside of your shipping box as you ship your item(s) back for a refund.

You will be liable for the shipping and any applicable customs/duty fees returning the item(s).

Incorrect items

If the return is made due to a faulty product, or an incorrectly shipped product, or if you are returning the item(s) due to a defect, or functionality issue, or because it is not the item you have ordered, we will gladly email or mail a return shipping label covering all shipping related expenses. In order to determine whether the return is initiated due to a technical problem, we may ask for you to provide visual support like images or a video on the item(s).


Returned merchandise must be in its original packaging, and placed in a decent shipping box, e.g. the same box that we shipped the items to you in. Please make sure to clearly mark the RMA code you have received from us outside on the box.

Do not forget to cover or peel off any existing shipping labels on the box.

DIT Supplies OÜ cannot be held accountable for return shipments that have not reached us or returns made without RMA codes. We strongly advise that if you are returning the item(s) with a carrier of your choice that you use a traceable shipping method.

It may take 4-5 business days for your return to reach us. Once it is received and inspected, your refund will be processed and automatically applied to your credit card or original method of payment within 14 business days. Please note that depending on your credit card company, it may take an additional 2-4 business days after your credit is applied for it to post to your account.

Customs, duties & taxes

There are no customs duties or taxes on orders shipping within the EU. Orders shipped outside of the EU may be subject to import taxes, customs duties and fees collected by the destination country. The recipient of an international shipment may be subject to such import taxes, customs duties and fees, which are collected once a shipment reaches the recipient's country. Additional charges for customs clearance must be paid for by the recipient; we have no control over these charges and cannot predict what they may be. Customs policies vary widely from country to country; and when customs clearance procedures are required, it can cause delays beyond our original delivery estimates. We advise that you contact your local customs office for more information.