Acasis 40Gbps 4-Bay Hybrid HDD & NVMe SSD Enclosure – 2 HDD + 2 SSD

ACASIS 40Gbps Hybrid Storage Enclosure/Dock – 2× HDD & 2× NVMe SSD Bays

Acasis 40Gbps 4-Bay Hybrid HDD NVMe Enclosure combines two NVMe SSD bays and two SATA HDD bays into a single, space-saving chassis so you can work from fast media and archive to high-capacity drives without swapping devices. The enclosure’s 40Gbps Thunderbolt/USB4 interface delivers ultrafast transfers for large media files and backups, while hardware RAID modes let you choose speed, redundancy, or simple JBOD capacity. An integrated 8K-capable DisplayPort output supports high-resolution monitoring for editing or playback, and a temperature-controlled fan keeps drives cool under sustained workloads. Ideal for video creators, backup-focused teams, and workstation users who need mixed-tier storage in one reliable box.

Features and Benefits

• Up to 76TB maximum raw storage capacity for large project files and long-term backups.

• 40Gbps Thunderbolt/USB4 interface for ultra-fast data transfer and low-latency workflows.

• 4 hardware RAID modes (RAID 0, RAID 1, JBOD, PM) for flexible balance of performance and protection.

• Hybrid design: 2 NVMe SSD bays plus 2 SATA HDD bays for tiered hot/cold storage in one enclosure.

• 8K DisplayPort output supporting up to 8K@60Hz for high-resolution monitoring.

• Smart temperature-controlled fan that automatically adjusts speed above 40°C to protect drives and reduce noise.

• Flat-mounted HDD layout to minimize vibration and improve long-term drive reliability.

Includes:

4-Bay Hybrid HDD NVMe Enclosure
12V Power Adapter
User Manual
50cm 40Gbps Cable
Thermal Pad
Screwdriver
Screw
RAID Mode Rotation Card

Product Q&A

• Q: Can SATA and M.2 NVMe drives be used in the same RAID array?
  A: According to the product FAQ, the hardware RAID does not support mixing SATA and NVMe drives in one array. Software RAID can combine them if needed.

• Q: Can I control the cooling fan manually?
  A: No. The fan runs automatically when internal temperature exceeds 40°C (104°F) and adjusts speed based on system temperature.

• Q: What maximum DisplayPort resolution and refresh rates are supported?
  A: The built-in DisplayPort supports up to 8K@60Hz and also supports 4K@144/120Hz and various high refresh-rate 2K modes (exact support depends on host GPU and monitor).

• Q: Which RAID modes are supported?
  A: The enclosure supports RAID 0, RAID 1, JBOD, and PM hardware modes.

• Q: Which hosts are supported for the 40Gbps connection?
  A: The product page states it is only compatible with USB4 and Thunderbolt 3/4/5 hosts.

• Q: Why does each NVMe slot only reach ~20Gbps on this 4-bay hybrid enclosure?
• A: This 4-bay hybrid enclosure is designed with a shared Thunderbolt 40Gbps architecture. Due to internal PCIe lane allocation, each NVMe slot is limited to a maximum of ~20Gbps, even when only one NVMe drive is installed. This design prioritizes stability and multi-drive operation rather than peak single-drive NVMe performance. For better NVMe performance within this model, we recommend using two NVMe drives in a software RAID 0 configuration to better utilize the available bandwidth, or RAID 1 for data protection.

Specification

• Part Number / SKU: EC-4501(H004)

• Maximum Storage: Up to 76TB

• Bays: 2 x NVMe M.2 SSD bays + 2 x 3.5"/2.5" SATA HDD bays (hybrid configuration)

• Interface: 40Gbps (USB4 / Thunderbolt 3/4/5 host required)

• Hardware RAID Modes: RAID 0, RAID 1, JBOD, PM

• Display Output: DisplayPort — up to 8K@60Hz

• Cooling: Smart temperature-controlled fan (auto on above 40°C / 104°F)

• Drive Mount: Flat-mounted HDD layout to reduce vibration

• Warranty: 1 year from date of delivery

Compatibility

Device Compatibility:

• Host Interface: Compatible with USB4 hosts and Thunderbolt 3, Thunderbolt 4, and Thunderbolt 5 hosts. Not compatible with hosts that do not implement USB4 or Thunderbolt 3/4/5.

Mac:

• Compatible with Mac.

Windows:

• Compatible with Windows PC.

Other OS:

• No specific OS compatibility statements (Chrome OS, Linux, iPadOS, etc.) were provided from manufacturer. 

Interface Requirements:

• Requires a host that supports USB4 or Thunderbolt 3/4/5 to achieve the 40Gbps interface speed.

• Not compatible with legacy USB-A, USB 3.2 Gen 2 (10Gbps) only hosts, or other non-USB4 / non-Thunderbolt hosts for full functionality.

NOTE: This 4-bay hybrid enclosure is designed with a shared Thunderbolt 40Gbps architecture. Due to internal PCIe lane allocation, each NVMe slot is limited to a maximum of ~20Gbps, even when only one NVMe drive is installed. This design prioritizes stability and multi-drive operation rather than peak single-drive NVMe performance. For better NVMe performance within this model, we recommend using two NVMe drives in a software RAID 0 configuration to better utilize the available bandwidth, or RAID 1 for data protection.

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