10000 Woodward Avenue
Woodridge, Illinois 60517
+1 773-869-1776
+1 (773) 869-1329
United States
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Product Status Discontinued on 2/8/2024


The U339-004 4-Bay USB 3.2 Gen1/eSATA to SATA Docking Station connects up to four 2.5- or 3.5-inch SATA hard disk drives (HDD) or solid state drives (SSD) to an available USB or eSATA port on your laptop or computer. This lets you back up important data, retrieve data from an old hard drive, or store information on an external drive that you can take with you to another computer.

Not only can you quickly access hard drive content without time-consuming internal installation, you can also clone a drive to as many as three others simultaneously. Cloning does not require the U339-004 to be connected to a host computer. Just insert the master drive into the master bay, insert the slave drive(s) into the slave bay(s), and press the Clone button twice. Red LEDs monitor cloning progress. The U339-004 accepts 2.5- and 3.5-inch SATA III, II and I hard drives up to 6 TB and will work with larger drives as they become available.

This docking station supports USB 3.2 Gen1 data transfer rates up to 5 Gbps, as well as eSATA rates up to 6 Gbps. Its UASP (USB Attached SCSI Protocol) feature reduces latency and allows the cable to perform up to 70% faster when connected to a UASP-enabled host controller.

The U339-004 requires no software or drivers. It’s compatible with all USB- and/or eSATA-enabled operating systems and backward-compatible with previous USB generations.


Connects Up to 4 SATA Drives to Your Computer’s USB or eSATA Port

  • Recommended for backing up, retrieving and storing large data files
  • Supports USB 3.2 Gen1 data transfer rates up to 5 Gbps
  • Supports eSATA data transfer rates up to 6 Gbps
  • Features UASP for performance up to 70% faster when connected to UASP-enabled host controller

Provides Offline Disk Cloning

  • Duplicates a hard drive on up to 3 others simultaneously
  • Offline cloning requires no computer connection

Compatible with 2.5 in. and 3.5 in. SATA HDDs and SSDs Up to 6 TB

  • Accepts SATA III, SATA II and SATA I drives
  • Backward-compatible with previous USB generations
  • Will work with larger SATA drives as they become available

Easy to Use

  • Plug-and-play—no software or drivers
  • No time-consuming internal installation required
  • Compatible with all USB- and/or eSATA-enabled operating systems
  • USB 3.2 Gen1 and eSATA cables included

System Requirements

  • Any USB- and/or eSATA-enabled operating system (cloning functionality will not work if the U339-004 is connected to a computer)
  • Available USB or eSATA port (USB 3.2 Gen1 required to achieve USB 3.2 Gen1 speeds. SATA III eSATA port required to achieve eSATA speeds.)
  • 2.5 in. or 3.5 in. SATA drive
  • UASP-enabled host controller required for UASP performance

Package Includes

  • U339-004 4-Bay USB 3.2 Gen1/eSATA to SATA Docking Station
  • USB 3.2 Gen1 cable, 2.5 ft.
  • eSATA cable, 2 ft.
  • External power supply with NEMA 1-15P plug (Input: 100-240V, 50/60 Hz, 1.2A; Output: 12V, 5A)
  • Owner's manual
RoHS compliant


UPC Code037332198709
AC Power Adapter Plug(s)NEMA 1-15P North America
AC Power Adapter Input Specs (V / Hz / A)100-240V / 50/60Hz / 1.5A
AC Power Adapter Output Specs (V / A)12V / 5A
AC Power Adapter Cord Length (ft.)4.9
AC Power Adapter Cord Length (m)1.5
Voltage Compatibility (VAC)100; 110; 120; 127; 200; 208; 220; 230; 240
Power Source TypeAC Adapter with detachable power cord
AC AdapterInput: 100-240V, 50/60Hz, 1.2A; Output: 12V, 5A
DC Barrel PlugOD: 5.5 x 2.1 x 10mm, Positive Pin, Negative Sleeve
Power Consumption (Watts)60
Number of Ports4
Side A - Connector 17 PIN ESATA (MALE); USB A (MALE)
Side B - Connector 1(4) 22 PIN SATA + POWER (FEMALE)
Connector PlatingNickel
LED IndicatorsRed (Read, Write, Power); Green (Clone)
Material of ConstructionABS, Steel
Shipping Dimensions (hwd / in.)2.80 x 6.70 x 9.60
Shipping Weight (lbs.)2.40
Unit Dimensions (hwd / in.)2.559 x 6.496 x 5.000
Unit Packaging TypeBox
Unit Weight (lbs.)1
Operating Temperature Range50° to 122°F (10° to 50°C)
Storage Temperature Range32° to 149°F (0° to 65°C)
Relative Humidity10% to 80% RH, Non-Condensing
BTUs  204.7 BTU/Hr
USB SpecificationUSB 3.2 Gen 1 (up to 5 Gbps)
UASP Support  Yes
Driver RequiredNo
External Power Supply CertificationsCE; FCC; UL; PSE; GS; RoHS; China RoHS
Product ComplianceRoHS; CE (Europe); REACH; FCC (USA)
Product Warranty Period (Worldwide)3-year limited warranty

Questions & Answers

USB Attached SCSI (UAS or UASP) is a computer protocol for transferring data to and from external USB storage devices, such as hard drives, solid state drives and flash drives.
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