The US2-B4 is a premium dual-bay M.2 NVMe enclosure engineered for creators and professionals who need maximum throughput and clean data separation. Built on USB4.0/40Gbps connectivity and designed to work with Thunderbolt™ 3 / 4 / 5 USB-C ports as a USB4® storage device (up to 40Gbps link speed on capable hosts), the US2-B4 delivers fast transfers and low-latency responsiveness—while keeping each SSD independent in JBOD mode for straightforward storage management.

 

With tool-free, removable SSD trays, active cooling, and hardware alarms (temperature / fan failure), the US2-B4 is optimized for sustained workloads. For mobile workflows, pairing with Easy Data Vault enables offline photo/video backup to external storage from USB-C iPhone/iPad—no cloud and no internet required.

 

Note: Connection speed and real-world throughput depend on the host port, cable, and SSD performance; the link negotiates to the best mutual capability.

Features

 

1. Performance & Connectivity

 

● USB4.0/40Gbps over USB-C for high-speed workflows

 

● Works with Thunderbolt™ 3 / 4 / 5 USB-C ports (performance scales by host/cable)

 

● JBOD (Independent Mode): two SSDs operate as separate volumes (no RAID)

 

2. SSD Support & Serviceability

 

● Supports PCIe M.2 NVMe SSDs: 2242 / 2260 / 2280

 

● Tool-free trays for fast installation and drive changes

 

● Drive status LEDs for activity and error indication

 

● For best data safety, eject the volume before removing a drive

 

3. Power, Cooling & Protection

 

● USB-C PD power input (5V / 3A) for stable operation

 

● Power-status LED alerts when input power is insufficient

 

 

 

● 30mm cooling fan with HI/LOW speed control

 

● Over-temperature and fan-failure alarms with buzzer mute (visual warnings remain active)

4. Mobile Offline Backup

 

● Easy Data Vault supports offline photo/video backup & restore to external storage on USB-C iPhone/iPad (no cloud/internet)

 

Buying Guide

 

Decision area	What to check	Why it matters	Practical buying tip
Host interface	USB-C USB 3.2 Gen 2 (10Gbps) vs Gen 2x2 (20Gbps); Thunderbolt™ 3/4 host use (as USB device)	Determines peak link speed. USB 3.2 defines 5/10/20Gbps tiers.	If you have mixed laptops/desktops, prioritize USB 20Gbps (Gen 2x2) but confirm your host PC actually supports 20Gbps (many USB-C ports are limited to 10Gbps).
Thunderbolt™ 3/4 compatibility	Can it plug into TB3/TB4 ports ?	Thunderbolt ports are designed to accept USB peripherals; performance follows USB negotiation.	Treat TB3/TB4 as a universal USB-C port for connectivity, but expect USB speeds unless the device is a true Thunderbolt device.
RAID support	Hardware RAID levels (RAID 0/1/5/10 + JBOD/BIG) vs JBOD-only	Hardware RAID provides OS-independent protection and predictable performance.	If you need fault tolerance, choose the SR4-B32 (RAID 5). JBOD-only models (like ST4-B32) are for expansion, not data protection.
Capacity scaling (4-bay)	Drive types (HDD/SSD), and max capacity	4-bay arrays scale to tens of TBs depending on drive size and RAID level	For the best value per TB, HDD RAID 5 is typical. For maximum performance, use SSDs with RAID 0.
Thermal design	Fan size & Chassis material	Sustains performance and drive longevity under long writes/RAID rebuilds	Prefer large fans (80mm+) and metal chassis for quieter, cooler continuous operation
OS compatibility	Windows / macOS / Linux support; any vendor utility dependencies	Avoid workflow friction	If a Windows tool exists, assume it is monitoring, unless explicitly documented for configuration
Target use case	Post, backup, shuttle, lab datasets	Drives the “right RAID + right port” decision	Map the workflow first (required RAID + required host port tier)

 

Applications

 

● Content Creation & Video Editing: fast media ingest, cache/scratch separation, rapid exports

 

● Data Backup & Archiving: two independent volumes for flexible organization

 

● Professional Workstations (CAD/3D): reduces load times and improves iteration speed

 

● Edge / Field Work: durable metal build + active thermal control

 

● AI / ML Development: high-throughput dataset staging and fast experiment cycles

 

Frequently Asked Questions

 

Q1: Why Choose US2-B4?

 

Decision Area	US2-B4 Advantage	Why It Matters	Buying Tip
Dual-Bay Flexibility	Two independent NVMe volumes (JBOD)	Separate scratch vs archive, clean project separation	Use one SSD for “active work”, one for “deliverables/backup”
Speed	USB4.0/40Gbps	Faster ingest/exports for large media & datasets	Pair with certified high-speed USB-C/USB4.0/TB cable
Ease of Service	Tool-free trays + status LEDs	Faster swaps, fewer mistakes	Always eject before removal
Sustained Reliability	Active cooling + alarms	More stable performance under load	Use HI fan for long renders/training jobs
Mobile Workflow	Easy Data Vault offline backup	Field backup without cloud dependency	Ideal for iPhone/iPad USB-C workflows

 

Q2: How do I choose US2-B4 vs UR2-B32?

 

If you need RAID (mirror/redundancy or stripe performance), choose UR2-B32. If you need maximum interface speed and two independent NVMe volumes, choose US2-B4.

 

Feature / Aspect	UR2-B32	US2-B4
Positioning	Dual NVMe enclosure with USB 3.2 Gen 2x2 + RAID	Dual NVMe enclosure with USB4.0/40Gbps + JBOD
Interface	USB 3.2 Gen 2x2 (20Gbps)	USB4.0 40Gbps
RAID Modes	RAID 0 / RAID 1 / BIG / JBOD	JBOD only (two independent volumes)
Best For	Users who want redundancy (RAID 1) or RAID performance	Creators/pros prioritizing speed + clean separation
iPhone/iPad Workflow	Easy Data Vault supported	Easy Data Vault supported

 

 

Q3: What SSDs does the US2-B4 support?

 

PCIe M.2 NVMe SSDs in 2242 / 2260 / 2280 form factors. M.2 SATA SSDs are not supported.

 

Q4: Does US2-B4 support RAID?

 

No. JBOD only—each SSD appears as a separate drive for maximum flexibility.

 

Q5: What speed should I expect?

 

Up to USB4.0 40Gbps link speed on capable hosts; real-world throughput depends on host, cable, and SSD performance.

 

Q6: Can I change SSDs while powered on?

 

The trays are designed for fast swaps. For best data safety, eject the volume before removing a drive.

 

Q7: Why does it need external power?

 

US2-B4 uses USB-C PD (5V/3A) input to keep operation stable under dual-NVMe and sustained workloads.

 

Q8: What happens if it overheats or the fan fails?

 

The enclosure monitors temperature/fan status and triggers alarm LED + buzzer for immediate warning.

 

Q9: Can I mute the buzzer?

 

Yes. Mute disables sound while visual alerts remain active until resolved.

 

Q10: Does it support iPhone/iPad offline backup?

 

Yes—using Easy Data Vault, you can back up photos/videos to external storage on USB-C iPhone/iPad without cloud/internet.

 

Q11: What are the best use cases?

 

High-speed ingest/edit/export, dual-volume project organization, workstation scratch + archive, and mobile/field offline backup.

 

 

Performance test result for reference. The test result will vary depend on the test environment.

 

 

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