StarTech.com USB 3.0 – eSATA 4-Bay 3.5in SATA III Hard Drive Enclosure w- built-in HDD Fan & UASP – SATA 6Gbps


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Out of stock


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

  • Built-in cooling fan
  • Four 3.5″ drive bays
  • USB 3.0 and eSATA cables included
  • Compatible with USB 3.0/2.0/1.1 (5 Gbps / 480 Mbps / 1.5 Mbps)
  • Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps) drives
  • Supports SATA III (6 Gbps) and UASP (5 Gbps) for optimal performance
SKU: ETI03799X
MPN: S3540BU33E
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