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USB 3.0 / eSATA Dual-Bay Trayless 3.5” SATA III Hard Drive Enclosure with UASP - 2-Bay SATA 6 Gbps Hot-Swap HDD Enclosure

Connect two hot-swappable 3.5" SATA III hard drives to your computer externally through USB 3.0 with UASP or eSATA

Product ID: S352BU33RER

  • Supports SATA III (6 Gbps) and UASP (5 Gbps) for optimal performance
  • Hardware RAID with support for RAID0 / RAID1 / BIG / JBOD
  • Trayless removable HDD slots with drive locks
View More
  • Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps) drives
  • Compatible with USB 3.0/2.0/1.1 (5 Gbps / 480 Mbps / 1.5 Mbps)
  • Front-mounted RAID controller
  • USB 3.0 and eSATA cables included
£149.99 GBP exc VAT
£179.99 GBP inc VAT
1+ In stock
Where To Buy

Technical Specifications

Warranty Information
Warranty 2 Years
Bus Type USB 3.0
Chipset ID JMicron - JMS562
Compatible Drive Types SATA
Drive Installation Removable
Drive Size 3.5in
Fan Bearing Type Sleeve Bearing
Fan(s) Yes
Fans 1 - 70 mm
Front Door Key Lock Yes
Interface USB 3.0 & eSATA
Number of Drives 2
Number of internal 3.5 inch bays 2
4Kn Support No
Air Flow Rate 12.72 CFM
Hot Swap Capability Yes
Max Drive Capacity Currently tested with up to 4TB 7200 RPM 3.5" hard drives per bay (8TB total) and 2TB 5900 RPM 2.5" hard drives (2TB total)
Maximum Data Transfer Rate 6 Gbps
Noise Level 26.24 dBa
Port Multiplier Yes
Supported RAID Modes BIG (Spanning or Concatenation)
JBOD - (Just a Bunch of Disks)
RAID 0 (Striped Disks)
RAID 1 (Mirrored Disks)
Type and Rate USB 3.0 - 5 Gbit/s
SATA III (6 Gbps)
UASP Support Yes
Drive Connectors 2 - SATA Data & Power Combo (7+15 pin) Receptacle
Host Connectors 1 - USB Type-B (9 pin) USB 3.0 Female
1 - eSATA (7 pin, Data) Female
OS Compatibility OS independent; No software or drivers required
LED Indicators 1 - HDD 1 Activity
1 - HDD 2 Activity
Input Voltage 100 - 240 AC
Output Current 3 A
Output Voltage 12V DC
Power Consumption (In Watts) 36
Power Source AC Adapter Included
Humidity 20%RH~80%RH
Operating Temperature 5°C to 35°C (41°F to 95°F)
Storage Temperature -20°C to 50°C (-4°F to 122°F)
Physical Characteristics
Product Height 11.8 cm [4.6 in]
Product Length 21.5 cm [8.5 in]
Product Width 13 cm [5.1 in]
Weight of Product 1.8 kg [4.1 lb]
Packaging Information
Package Height 18.7 cm [7.4 in]
Package Length 30.1 cm [11.9 in]
Package Width 20.8 cm [8.2 in]
Shipping (Package) Weight 2.9 kg [6.3 lb]
What's in the Box
Included in Package 1 - USB 3.0/eSATA Dual 3.5" SATA HDD Trayless Enclosure
1 - eSATA Cable
1 - USB 3.0 Cable
2 - Drive Bay Keys
1 - Universal Power Adapter (NA/UK/EU)
1 - Instruction manual
Supports any operating system.
No additional drivers or software required.



USB 3.0 / eSATA Dual-Bay Trayless 3.5” SATA III Hard Drive Enclosure with UASP - 2-Bay SATA 6 Gbps Hot-Swap HDD Enclosure

Customer Reviews

3 (3 reviews)
3 out of 5 stars
Quality of Product
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1 - 3 of 3 Reviews

(3 stars) Awesome Minus Cheap Fan

By: CPUaffinity
This enclosure has been solid for quite some time. Probably just outside of the warranty period. Everything was great until the fan started making noise randomly. It is not easy to replace unless you have tiny hands.
Comment Helpful? Yes - 0 No - 0 Report
Response from
Matt, Customer Support
We're sorry to hear about the issues that you're experiencing with the fan on our S352BU33RER. We would like to speak with you about this problem as the fan should not be making any random noises. Please feel free to contact us at and reference this review so that we can help fix this for you. Our Technical Advisors are available 24 hours a day, 5 days a week to provide assistance.

(2 stars) rigid case but has areas for improvement

By: doomi
after around a year or two of constant work as a server raid datastorage the fan stopped working. Replacing it is possible but plug is a bit hard to reach. The documentation, especially for the LED signals should be dramatically improved - some forums are better information sources than the official manual. Something I am currently struggling with and I can't find any info about, is if this enclosure is compatible with 4Kn drives - I have put two 6TB 4Kn (HGST) drives in now and did some tries but do not have the feeling it works (attached via eSATA or USB to a Ryzen 7 system on win10). One LED is constant blue, one LED is constant purple (=red) for over half an hour now and the PC doesn't detect anything. At some point the discs also slow down. Same situation with only 1 drive plugged in. The HDDs themselves are new and both ok and detected fine when directly attached to the internal SATA ports of the PC. The controller is a JMicron - JMS562 which (bad) documentation is also not mentioning 4Kn support, only Win8 compatibility is assured which would speak pro 4Kn, but I fear this is not the case. The enclosure itself is rigid and easy to use. the eSATA cable could be fixed a bit better, but it's ok. the probably missing 4Kn support and the bad LED documentation as well as the broken fan however make me rate it with 2-3 stars max. Oh, and I also lost the raid 1 one or two times with the old disks and was glad I had some backups...
Comment Helpful? Yes - 2 No - 0 Report
Response from
Brian, Customer Support
Thanks for sharing your feedback. We really apologize for the confusion about the LEDs and 4Kn drive support. We'd be happy to replace the fan if the product is within the 2 year warranty period. Regarding the LED behavior, during normal operation each drive LED will be solid blue. When there is drive activity a red LED will also flash making it appear purple. When the Rebuild light is on the array has encountered an error. The rebuild light will flash while the array is rebuilding. During the rebuild process both drive activity lights will flicker frequently appearing purple. We'll update our online manual to include this information. Unfortunately this model does not function with 4Kn drives. We recommend our S352BU313R if you require a 2 bay enclosure with RAID functionality and the ability to use 4Kn drives.

(4 stars) Works good with some tweaking.

By: Locotin
I had it for 4 months. I wanted a Raid0 for my games. Tried the 3.0. USB cable and it initialized great but I lost my raid after a couple of days. Also, I had to connect and disconnect everytime my laptop when to sleep or idle for too long. I tried disabling all USB sleep times and nothing. I kept losing my Raid0 after a while. Then I got a brainstorm and decided to use the eSATA to USB that I bought with it which I did not think I need it. I connected the eSATA side to the enclosure and the USB directly to the laptop bypassing all HUBS. WORKED GREAT. It has been three months now and my Raid0 is intact half way full with games and works super fast and my games have no lag whatsoever. the only thing I dont like is this humming sound it makes when it turning on or off. It makes me feel like is about to fail. Is not my drives is the enclosure making that weird, old sound humming. Other that that, it has been working great with the eSATA to USB cable.
Comment Helpful? Yes - 9 No - 0 Report