• Create an external dual 35in HDD SATA RAID array connected through either USB 30 with UASP or eSATA.
• USB 30 eSATA Dual 35" SATA III Hard Drive External RAID Enclosure w/ UASP and Fan.
• Black.
• Compatible with SATA revision I/II/III (15/30/60 Gbps).
• HDD RAID Enclosure.

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) Hardware RAID Plug-and-Play Compatible Dual Drive Bay Built-in Fan 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 StarTech.com 2-year warranty and free lifetime technical support. UASP is supported in Windows 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. Video editing or photography professional/enthusiasts working with very large file sizes Business applications that require external RAID storage for data redundancy Transfer large files between computers quickly and securely without a network Scenarios requiring easy storage transferability between different computer systems and large volume external storage for backups/archiving Versatile connectivity options, through either USB or eSATA Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported host Achieve greater drive capacity or secure data redundancy with multiple RAID modes Maximize performance, with file transfer speeds up to 6Gbps using SATA III Specifications Warranty Information Warranty 2 Years Connector(s) Drive Connectors SATA Data & Power Combo (7+15 pin) Host Connectors eSATA (7 pin, Data) USB Type-B (9 pin) USB 3.0 Environmental Operating Temperature 5°C to 35°C (41°F to 95°F) Storage Temperature -20°C to 50°C (-4°F to 122°F) Humidity 20%RH ~ 80%RH Hardware Interface USB 3.0 eSATA Number of Drives 2 Drive Size 3.5in Compatible Drive Types SATA Drive Installation Fixed Number of internal 3.5 inch bays 2 Fan(s) Yes 1 - Fans 40 mm Fan Bearing Type Ball Bearing Chipset ID JMicron - JMS562 Indicators 1 - LED Indicators Enclosure Power LED Drive 1 Activity LED Drive 2 Activity LED Packaging Information Package Height 5.5 in [14.0 cm] Package Length 10.1 in [25.6 cm] Package Width 7.1 in [18.0 cm] Shipping (Package) Weight 3.0 lb [1.4 kg] Performance Type and Rate USB 3.0 - 5 Gbit/s UASP Support Yes Type and Rate SATA III (6 Gbps) Port Multiplier Yes Hardware Raid Supported Yes Supported RAID Modes RAID 1 (Mirrored Disks) BIG (Spanning or Concatenation) RAID 0 (Striped Disks) JBOD - (Just a Bunch of Disks) Max Drive Capacity Currently tested with up to 4TB 7200 RPM hard drive Hot Swap Capability Yes MTBF 30,000 hours Physical Characteristics Color Black Material Aluminum and Plastic Product Length 6.9 in [17.6 cm] Product Width 4.4 in [11.3 cm] Product Height 3.3 in [8.5 cm] Weight of Product 21.9 oz [620.0 g] Power Power Source AC Adapter Included Input Voltage 100 - 240 AC Output Voltage 12V DC Output Current 3 A Center Tip Polarity Positive Plug Type M Power Consumption (In Watts) 36 Software OS Compatibility OS independent; No software or drivers required Microsoft WHQL Certified Yes What's in the Box 1 - Included in Package USB 3.0/eSATA HDD RAID enclosure eSATA cable USB 3.0 cable universal power adapter (NA,EU,UK) rubber foot set instruction manual