StarTech.com ESATA/USB 3.0 SATA 4-Bay 3.5 inch Hard Drive Enclosure with Uasp

StarTech.com S3540BU33E

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Manufacturer Part#  S3540BU33E

Provantage Code:  STR93HU

Condition:  Factory New

  • Product Type: Drive Enclosure
  • Form Factor: External
  • Number of Total Expansion Bays: 4
  • Controller Type: Serial ATA/600
  • TAA Compliant: No

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StarTech.com S3540BU33E Specifications

    ESATA/USB 3.0 SATA 4-Bay 3.5 inch Hard Drive Enclosure with Uasp

At a Glance

    Rear View
    • Supports SATA III (6 Gbps) and UASP (5 Gbps) for optimal performance
    • 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)
    • USB 3.0 and eSATA cables included
    • Four 3.5" drive bays
    • Built-in cooling fan


    Front View

    The S3540BU33E 4-Bay HDD enclosure lets you install four 3.5" SATA hard drives into an external enclosure, and connect to your computer through USB 3.0 or eSATA.

    For fast performance and efficient data transfers, the enclosure supports SATA III transfer speeds -- up to 6 Gbps when connected through eSATA. The versatile enclosure can also be connected through USB 3.0, with support for UASP, performing up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller. See our UASP testing results below for further details.

    The S3540BU33E is backed by a StarTech.com 2-year warranty and free lifetime technical support. Improved Performance with UASP

    UASP is supported in Windows 10/8, Mac OSX (10.8 or above), and Linux. In testing, UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance.

    At the same peak in testing UASP also shows an 80% reduction in required processor resources.

    Testing results were obtained using an Intel® Ivy Bridge system, a UASP-enabled StarTech.com Enclosure, and a SATA III solid state drive.

    More from the Manufacturer

Certifications & Standards

Environmental Certification




Package Contents

    • USB 3.0/eSATA 4-Bay 3.5" SATA Hard Drive Enclosure
    • 1 x eSATA Cable
    • 1 x USB 3.0 Cable
    • 1 x Universal Power Adapter (NA/UK/EU)
    • 1 x Instruction Manual


General Information
Product NameESATA/USB 3.0 SATA 4-Bay 3.5 inch Hard Drive Enclosure with Uasp
Manufacturer Part NumberS3540BU33E
Packaged Quantity1
Product TypeDrive Enclosure
Technical Information
Number of Hard Drives Supported4
Number of Solid State Drive Supported4
Host InterfaceUSB 3.0


I/O Expansions
Number of Total Expansion Bays4
Number of 3.5" Bays4
Network & Communication
Wireless LANNo
Physical Characteristics
Cooling FanYes
Form FactorExternal
Limited Warranty2 Year
Environmentally FriendlyYes
Other Information
Controller TypeSerial ATA/600
Input Voltage120 V AC

230 V AC

Platform SupportedMac



Power SourceAC Adapter
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Mfg Part# PEXUSB3S11

StarTech.com 1ft Superspeed USB 3.0 Cable A to B M/M

Mfg Part# USB3SAB1

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