S3520BU33ER USB 3.0/eSATA Dual 3.5” SATA III HDD RAID Enc Part number: V209695
Manufacturer product ID: S3520BU33ER
UPC Code: UPC65030853613
Box quantity: 8*
Sub-category: Enclosures
Weight (Kg): 1.36
Warranty period: 24 Months
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Create an external dual 3.5in HDD SATA RAID array, connected through either USB 3.0 with UASP or eSATA

Key Features
  • UASP Support (Attached SCSI Protocol Specification Revision 1.0)
  • eSATA or USB Host Connection
  • Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps)

FULL TITLE - S3520BU33ER USB 3.0/eSATA Dual 3.5” SATA III Hard Drive External RAID Enclosure w/ UASP and Fan – Black

The S3520BU33ER 2-Bay RAID Enclosure offers a high-performance external storage solution, enabling you to build a secure RAID array with two 3.5” SATA hard drives, with the option to connect it to your computer through either an available USB 3.0 or eSATA port.

For fast data transfers and efficient performance from your SATA III drives, the RAID enclosure supports full SATA III transfer speeds (up to 6 Gbps), as well as full USB 3.0 transfer speeds (up to 5Gbps). When connected through USB, the enclosure supports UASP, which offers performance up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller (see our performance below).

With support for JBOD, Spanning, RAID 0, and RAID 1,the enclosure offers several options that enable you to customize your drive arrangement based on your storage requirements. 

To maximize both durability and reliability, the external RAID enclosure features high-quality aluminum construction with a built-in fan that helps improve ventilation and maintain a better operating environment for your drives.

The HDD enclosure offers a versatile solution for increasing the storage/backup capabilities of your computer, with support for large capacity hard drives (tested up to 4TB). 

To ensure compatibility with your computer system, the S3520BU33ER supports all of the leading operating systems, including: Microsoft Windows® (8/7/Vista/XP/Server 2008/Server 2003), Apple® OSX (10.9/10.8/10.7/10.6), Linux, and Google Chrome OS™.

It is backed by a 2-year warranty and free lifetime technical support.


  Chipset ID JMicron - JMS562
  Compatible Drive Types SATA
  Drive Installation Fixed
  Drive Size 3.5in
  Fan Bearing Type Ball Bearing
  Fan(s) Yes
  Fans 1 - 40 mm
  Interface eSATA
    USB 3.0
  Number of Drives 2
  Number of internal 3.5 inch bays 2
  Hot Swap Capability Yes
  Max Drive Capacity Currently tested with up to 4TB 7200 RPM hard drive
  MTBF 30,000 hours
  Port Multiplier Yes
  RAID 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 SATA Data & Power Combo (7+15 pin) Receptacle
  Host Connectors eSATA (7 pin, Data) Female
    USB Type-B (9 pin) USB 3.0 Female
  Microsoft WHQL Certified Yes
  OS Compatibility OS independent; No software or drivers required
  LED Indicators 1 - Enclosure Power LED
    1 - Drive 1 Activity LED
    1 - Drive 2 Activity LED
  Center Tip Polarity Positive
  Input Voltage 100 ~ 240 AC
  Output Current 3 A
  Output Voltage 12 DC
  Plug Type M
  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
  Color Black
  Enclosure Type Aluminum and Plastic
  Product Height 85 mm [3.3 in]
  Product Length 176 mm [6.9 in]
  Product Weight 620 g [21.9 oz]
  Product Width 113 mm [4.4 in]
Packaging Information
  Shipping (Package) Weight 1.4 kg [3 lb]
What's in the Box
  Included in Package 1 - USB 3.0/eSATA HDD RAID enclosure
    1 - eSATA cable
    1 - USB 3.0 cable
    1 - universal power adapter (NA,EU,UK)
    1 - rubber foot set
    1 - instruction manual 

*Box quantity refers to the number of units contained in this product's outer packaging. It does not refer to the number of products purchased for the quoted unit price unless otherwise stated.

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