U2ATA25OTG01 is an USB 2.0 to ATA enclosure with On-The-Go function for 2.5 inch HDD. U2ATA25OTG01 can be set to either PC or OTG mode:

  • PC mode:
    It's designed to enable hot-swap, plug-and-play operation for 2.5" ATA HDD through the connection to USB 2.0 interface installed on a computer.

  • USB On-The-Go host mode:
    U2ATA25OTG01 provides the On-The-Go function for backup of data from other USB storage device.

Technical Specifications

U2ATA25OTG01 combines two key components.
1).USB 2.0 to ATA Bridge Board

1).USB 2.0 to ATA Bridge Board:

  • IDE (ATA) Interface: Female mini 2X22 pin Connector
  • USB 2.0 Interface: One USB A-Type connector
  • USB Bus Transfer Rate: High Speed (480 Mbit) And Full Speed (12 Mbit)
  • USB Bus Power: Bus Powered Mode Operation
  • Power indicator LED and HDD Access LED
  • DC Power Connector: Walkman-type 2.0 mm DC Jack
  • Complies with ATA/ATAPI-6 Draft Specification:
    • PIO Mode 0-4
    • DMA Mode 0 ~ 2
    • Ultra DMA Mode 0-4 and LBA48


  • Aluminum made housing.
  • Provide one push button on the front panel
  • Provide one slide switch for PC or OTG mode selection
  • Provide Lock Ring
  • Provide Foot Stand to hold U2ATA25OTG01 stand still
  • Provide the screw hole for 2.5" ATA HDD.
  • Two Power Input
    • USB Bus-powered
    • DC Power Input: DC +6V ~ 12V.
  • USB Bus Power Link Cable(Applied when connecting USB host with 500mA current limitation)
    • Allocate two free USB ports from the computer.
    • Plug the USB A plug connector of the USB Bus Power Link Cable into the USB port.
    • This will allow one of the USB port to supply more than 500mA current for the USB device.
Net Weight
  • 202.2g
Hardware Requirements
  • Desktop PC: with either a built-in USB (1.0 or 2.0) controller or a USB (1.0 or 2.0) to PCI Host Adapter equipped with a external USB port.
  • Laptop PC: with either a built-in USB (1.0 or 2.0) controller or a USB (1.0 or 2.0) to CardBus PC Card equipped with a external USB port.
Operating System Requirements
  • Windows 98SE/ME/2000/XP; MacOS 9.1 or higher
Kit includes
  • U2ATA25OTG01 Enclosure
  • Blue color Foot Stand
  • USB 2.0 A-to-A type Cable (1.0m length)
  • USB Bus Power Link Cable
  • Battery Pack for 6pcs AA battery
  • DC power cable for using the standard 9V Battery
  • T-shape Screw Driver
  • Screws for 2.5" HDD
  • CD-title (Win98 drivers,Flash Mail, Mobile Outlook and PCClone EX Backup software)
  • Installation Guide
  • Protection Bag