USB 3.0 / eSATA 4-Bay 3.5in SATA III Hard Drive Enclosure w/ built-in HDD Fan & UASP – SATA 6Gbps
S3540BU33E

Overview
Add four 3.5" SATA III hard drives to your computer externally through USB 3.0 with UASP or eSATA


Features
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

Description
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.


The StarTech.com Advantage
Versatile connectivity options, through either USB or eSATA Maximize performance, with file transfer speeds up to 6Gbps using eSATA Keep your drives running cooler, with a built-in fan

Applications
Use external hard drives for high-performance applications such video editing or photography Create an external backup of important data Build an external software RAID array Expand the storage capacity of your desktop or laptop computer, through an external eSATA connection

Specifications
Drive ConnectorsSATA Data & Power Combo (7+15 pin) Receptacle Host ConnectorseSATA (7 pin, Data) Female Humidity20%RH ~ 80%RH Operating Temperature5°C to 35°C (41°F to 95°F) Storage Temperature-20°C to 50°C (-4°F to 122°F) Bus TypeUSB 3.0 Chipset IDJMicron - JMS567JMicron - JMB575 Compatible Drive TypesSATA Drive InstallationFixed Drive Size3.5in Fan(s)Yes Fans80 mm InterfaceUSB 3.0 & eSATA Number of Drives4 Number of internal 3.5 inch bays4 LED IndicatorsHDD Activity LEDs ''Power LED Package Height19.7 cm [7.8 in] Package Length28.2 cm [11.1 in] Package Width22.2 cm [8.7 in] Shipping (Package) Weight2.2 kg [4.9 lb] General SpecificationsSupports 2.5in Solid State Drives (SSD) and Hard Drives (HDD) using a 2.5in to 3.5in drive adapter such as 25SAT35HDD and 25SATSAS35 Hot Swap CapabilityNo Max Drive CapacityCurrently tested with up to 6TB 7200 RPM hard drives Maximum Data Transfer Rate6 Gbps (eSATA)Maximum Data Transfer Rate5 Gbps (USB 3.0) Port MultiplierYes RAIDNo Type and RateSATA III (6 Gbps) ''USB 3.0 - 5 Gbit/s UASP SupportYes Product Height14.3 cm [5.6 in] Product Length20 cm [7.9 in] Product Width11.4 cm [4.5 in] Weight of Product1 kg [2.3 lb] Input Current2.5 A Input Voltage100 - 240 AC Output Current6.5 A Output Voltage12V DC Power Consumption (In Watts)78 Power SourceAC Adapter Included OS CompatibilityOS independent; No software or drivers required Included in PackageeSATA cable ''instruction manual ''universal power adapter (NA,UK,EU) ''USB 3.0 cable ''USB 3.0/eSATA 4-Bay 3.5" SATA hard drive enclosure