IN STOCK TO SHIP EXPRESS TODAY! Four-Slot USB4 (40Gb/s) External Storage Enclosure with SoftRAID for NVMe M.2 2230 / 2242 / 2280 SSDs Read our quick guide on RAID The incredibly configurable, compatible, and compact DIY RAID Highly Capable: Up to 3200MB/s real-world performance Highly Compatible: Use with USB4, Thunderbolt, and USB-C Macs and PCs Highly Reliable: Aircraft grade aluminum offers rugged protection of installed SSDs plus effective heat dissipation to keep everything cool for consistent top speed Near Silent Operation: Engineered with smart, adaptive fans that activate only when needed or under heavy load, making it ideal for uninterrupted creative focus DIY easy: Use your choice of NVMe M.2 2230, 2242, or 2280 SSDs Includes SoftRAID: robust software for creating, monitoring, and managing advanced RAID sets Complete: Includes USB-C 40Gb/s cable 2 Year Warranty The Best DIY Raid You Wanted We heard you loud and clear (pun intended) when you said you loved everything about the Express 4M2 but wanted it quieter. After adding smart adaptive fans that only turn on when needed for near silent operation, we decided to give it USB4 connectivity for the optimum blend of compatibility, performance, and affordability. Now you can build a desktop/shuttle high-performance RAID with your choice of NVMe M.2 SSDs and get up to 3200MB/s performance with USB4, Thunderbolt, and USB-C Macs and PCs. Express 4M2 is ideal for: DITs and Filmmakers wanting to build an affordable yet high‑performance NVMe SSD RAID with up to 32TB of capacity, RAID 5 capabilities, and the ability to deliver maximum offload speeds and thermal stability when backing up media cards from multiple cameras on set. Professional Video Editors, VFX Artists, Colorists, and High‑Volume Photographers seeking an easy DIY high‑performance NVMe SSD RAID to handle demanding post‑production and editing workflows including 8K RAW video, VFX compositing work, multicam sequences in 4K RAW or ProRes video, and batch editing ultra‑high‑resolution pictures. Anyone looking for a lower‑cost RAID option to the award‑winning four NVMe M.2‑based OWC ThunderBlade and are willing to accept the Express 4M2’s larger form factor, fan cooling, no additional connectivity ports, and no ballistic shipping case for shuttle use. Express 4M2 Connected To… Runs As Up to Real-World Speed Mac computers with Apple silicon M1/M2/M3/M4 USB4 (40Gb/s) 3200MB/s USB4 (40Gb/s) port on any PC USB4 (40Gb/s) 3200MB/s Thunderbolt 5 port on any Mac or PC USB4 (40Gb/s) 3200 MB/s Thunderbolt 4 port on any Mac or PC USB4 (40Gb/s) 3200MB/s Thunderbolt 3 port on Intel Mac Thunderbolt (40Gb/s) 3000MB/s Thunderbolt 3 port on PC USB 3.2 (10Gb/s) 990MB/s USB 3.2 port on PC USB 3.2 (10Gb/s) 990MB/s Highly CapableUp to 3200MB/s real-world performance Highly CompatibleUse with USB4, Thunderbolt, and USB-C Macs and PCs Highly ReliableAircraft grade aluminum offers rugged protection of installed SSDs plus effective heat dissipation to keep everything cool for consistent top speed Near Silent OperationEngineered with smart, adaptive fans that activate only when needed or under heavy load, making it ideal for uninterrupted creative focus DIY EasyUse your choice of NVMe M.2 2230, 2242, or 2280 SSDs RAID ReadyCertain models include OWC SoftRAID; the fastest and most flexible RAID 0/1/4/5/1+0 (10) tool. Also supports Apple Disk Utility RAID, Windows Disk Management RAID, and Windows Storage Spaces CompleteIncludes USB-C 40Gb/s cable StableIncluded stand ensures maximum desktop placement stability Includes (1) OWC Express 4M2 USB4 (40Gb/s) External Storage Enclosure (1) 0.7M (28") USB-C 40Gb/s Cable (1) External Power Supply (1) US Power Cable (2-Prong IEC C7) Support Manual for OWC Express 4M2 (Digital) (1) 3 Years of SoftRAID Premium Access (License located on device) (1) Quick Start Guide for OWC SoftRAID (Digital) 2 Year Warranty Specs Drive Bays 4 bays supporting M.2 SSDs Supports single/double-sided M.2 2280, M.2 2242, M.2 2230 "M Key" drives NVMe SSDs with heatsinks are not supported Each bay offers PCIe 4.0 x1 performance Single drive performance up to 1600MB/s Hot Plug Support Yes Boot Support All four drives are bootable on macOS SSDs with 512 byte sectors required macOS 10.13 or later Boot Camp is not supported RAID Capable Yes RAID Levels Supported RAID 0 RAID 1 RAID 4 RAID 5 RAID 10 JBOD RAID Features Software RAID Device Ports (1) Host Port - USB4 (USB-C) Up to 40Gb/s (or 5000MB/s) USB 3.2 Gen 2 (USB-C) up to 10Gb/s (1250MB/s) backwards compatible UASP Support Yes (USB Attached SCSI Protocol) Data Transfer Rate (Maximum) USB4: Up to 40Gb/s (or 5000MB/s) USB 3.2 Gen 2: Up to 10Gb/s (or 1250MB/s) Chipset / Controller USB4: Asmedia ASM-2464PDX MTBF (Mean Time Between Failures) Varies depending on drive mechanism installed Host Interface Requirements Works with any USB 3.2 Gen 2 (USB-C) and later Thunderbolt 3 and later equipped Mac, PC, or Linux system Mac OS Compatibility macOS 14.x Sonoma macOS 15.x Sequoia PC OS Compatibility Windows 10 32-/64-bit Edition Windows 11 Windows Server 2016 Windows Server 2019 Windows Server 2022 Driver Required No Other Requirements For SSDs with 512 byte sectors, macOS 10.13 or later is required SoftRAID works with macOS 10.14+ and Windows 10+ SoftRAID is licensed per computer and requires a serial number RAID 4/10 (10) are Mac only at this time Additional seats for SoftRAID can be purchased External Power Adapter Yes Power Supply External UL-listed universal auto-switching power supply +12V, 4A output Need an additional power supply? Secondary/replacement power supplies are available AC Input 100–240V, 50-60Hz, 1.5A DC Output +12V, 4A Wattage 48W Fans (2) 40mm 4,000RPM cooling fans < 35°C (fan off) 35°C (FAN-PWM 40%) 45°C (FAN-PWM 60%) 50°C (FAN-PWM 80%) 55°C (FAN-PWM 100%) Security Slot No Power/Activity LED Yes Housing Color Silver Housing Material Aluminum Dimensions Height: 13.9 cm (5.5 in) Length: 17.8 cm (7.0 in) Width: 6.0 cm (2.4 in) Weight 1.8 kg (3.97 lbs) Certifications CE FCC UKCA ICES VCCI Ambient Temperature Operating: 32°F to 104°F (0°C to 40°C) Non-operating: -4°F to 158°F (-20°C to 70°C) Altitude Operating: -304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft) Non-operating: -304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)
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