OWC ThunderBay 4
Perfect in All, for All
Speed, capacity, and configuration flexibility in a compact desktop footprint. ThunderBay 4 is perfection for a myriad of content creators and the reason it’s been one of the best-selling RAID storage solutions for the past decade.
Handle it all from everyday file storage and backup to running multi-stream compressed 4K video. Choose a preconfigured solution to start working immediately or add your own HDDs or SSDs to a DIY kit. Configure ThunderBay 4 with OWC SoftRAID or your own RAID software to achieve your optimum level of performance and data redundancy. Add additional ThunderBay 4 or other Thunderbolt storage devices to the second Thunderbolt port and flex bigger capacity muscle. In every imaginable way, ThunderBay 4 is perfect in all, for all.
How Much Content you can Store

Mac-Ready Across the Board
ThunderBay 4 checks all the functional boxes to make you a more efficient content creator: fast data access, enormous storage capacity, centralized (and hassle-free!) file location, and it works with Macs (Intel-based plus the latest Apple Silicon M1/M2/M3/M4 machines) and Windows PCs. What makes ThunderBay 4 the best 4 bay storage solution available is its time-proven reputation of providing peace of mind your data will be safely protected today and tomorrow. Gone is the fear of a costly slow down or — gulp — losing irreplaceable data because you didn’t select the right RAID solution
The Most Powerful RAID Tool on the Planet.
SoftRAID is the world’s fastest and most flexible application to configure, maintain, and protect your RAID volumes on Mac and PC. OWC enclosures include 3 Years of SoftRAID Premium.
- High-Performance RAID 0/1/4/5/1+0 (10) volumes
- Predictive Health Monitoring proactively notifies of Volume and Disk issues well before failure — provided on your computer and remotely
- Seamless Cross-Platform Sharing with support for Apple-formatted APFS and HFS+ SoftRAID volumes between Mac and Windows at no additional cost
- 35+ Years of Experience of Pro Support to provide peace-of-mind with setup help, ongoing questions, or urgent disk issues
Specifications:
Device Specifications |
Drive Bays |
4 bays supporting: 2.5"/3.5" SATA HDDs and SSDs |
Plug and Play |
Yes |
Hot Swap Support |
Yes |
Boot Support |
Boot Camp is not supported |
Storage Interface |
SATA 6.0 Gb/s |
RAID Capable |
Yes |
RAID Levels Supported |
JBOD, RAID 0, RAID 1, RAID 4, RAID 5, RAID 10 |
RAID Features |
Software RAID |
Device Ports |
(1) Thunderbolt 3 (USB-C) Host Port (1) Thunderbolt 3 (USB-C) Port Either port can act as host |
Power Delivery |
Up to 15W per Thunderbolt 3 port to host/device |
UASP Support |
Yes |
Max Data Transfer Rate |
Thunderbolt 3: Up to 40Gb/s (5000MB/s) |
Chipset / Controller |
SATA: ASM-1164 Thunderbolt 3: Intel DSL6540 |
Host Interface Requirements |
Thunderbolt (USB-C); backward compatible with TB2/TB1 |
Mac OS Compatibility |
macOS 10.14 Mojave macOS 10.15 Catalina macOS 11.x Big Sur macOS 12.x Monterey macOS 13.x Ventura macOS 14.x Sonoma macOS 15.x Sequoia |
PC OS Compatibility |
Windows 10 64-bit, Windows Server 2022, Windows 11 |
Other Requirements |
SoftRAID required (macOS 10.14+ / Windows 10+). License valid for Mac or Windows (one active use at a time). RAID 4 and RAID 10 supported only on Mac. |
External Power Adapter |
No |
Power Supply |
Internal UL-listed universal auto-switching |
AC Input |
100–230V |
Cooling |
One 92mm cooling fan |
Security Slot |
Yes |
Power Button |
Yes |
Power/Activity LED |
Yes |
Housing Color |
Black |
Housing Material |
Aluminum |
Dimensions |
Height: 19.1 cm (7.5 in) Length: 24.5 cm (9.6 in) Width: 13.5 cm (5.3 in) |
Weight |
3.9 kg (8.60 lbs) |
REACH Certification |
Yes |
Ambient Temperature |
Operating: 10°C to 35°C (50°F to 95°F) Non-Operating: -40°C to 65°C (-40°F to 149°F) |
Humidity |
Operating: 8% to 90% non-condensing Non-Operating: 5% to 95% non-condensing |