• Overview
  • Tech Specs

Add Fast 6Gb/s eSATA and SuperSpeed USB 3.0 Connectivity to Your Computer With One Adapter

Do you need to connect high-speed USB 3.0 and eSATA devices to your computer? Sonnet’s USB 3.0+eSATA Thunderbolt Adapter provides you a simple, economical way to simultaneously connect one USB 3.0 device plus one eSATA drive or card reader to any Mac® with a Thunderbolt 2 or Thunderbolt port, or Windows® computer with Thunderbolt 2 ports. Featuring 10Gbps Thunderbolt technology, this compact adapter connects directly to your computer or at the end of a Thunderbolt device chain with its built-in Thunderbolt cable to enable fast data transfers between your drives and computer.

USB 3.0 for Fast Performance and Common Connectivity

USB 3.0 Performance IconMost drives available today include USB 3.0 interfaces. Although you can connect them to the USB 2.0 ports on your computer, their performance would be reduced by as much as 85 percent! This useful adapter offers native USB 3.0 support to ensure great performance from the fast drives you connect, enabling data transfers at up to 350 MB/s. The USB 3.0 + Gigabit Ethernet Thunderbolt Adapter supports UASP (USB Attached SCSI Protocol) support, ensuring that UASP-enabled external drives connected to the adapter achieve their maximum data transfer rate potential, with performance improved by up to 20% above the drive connected to a USB host without UASP support. Need to connect more than one drive? The adapter works with multi-drive enclosures(1) with hardware raid controllers, too. This adapter also supports hubs and other USB 3.0 devices, and is backward compatible with USB 2.0 devices(2). If your computer already has USB 3.0 onboard, this adapter provides another handy port.

Key Features

Adds Two High-Throughput Interfaces With One Adapter—Connects one 5.0 Gb/s USB 3.0 port and one 6Gb/s eSATA port to computers with Thunderbolt ports

10 Gbps Thunderbolt interface—Enables fast data transfers between drives and computer

Built-in Thunderbolt Cable—Flexible 5-inch (125 mm) Thunderbolt cable connects directly to your computer or at the end of a Thunderbolt daisy chain

Supports Multi-Drive Enclosures—eSATA port supports drive enclosures with port multipliers; eSATA port and USB port support drive enclosures with hardware RAID controllers

Broad USB 3.0 Device Support & Compatibility—Supports storage, hubs, and other USB-IF compliant USB 3.0 devices; compatible with USB 2.0 devices

Boot Support Over eSATA—Supports booting under OS X from drives connected via eSATA

Bus-powered Operation—No AC power adapter required


Thunderbolt Logo Icon Built-in Thunderbolt Cable
10Gbps Thunderbolt connection between computer and devices
USB Logo Icon Adds USB 3.0 Port
Connect devices such as external backup drives, hubs, and iOS devices
eSATA Logo Icon Adds 6Gb/s eSATA Port
Connect drives and media readers with eSATA interfaces

eSATA for Extra Speed

eSATA & SSDs Arrows IconSonnet’s USB 3.0+eSATA Thunderbolt Adapter is well suited to handle the increased bandwidth requirements of 6Gb/s SSDs through its fast eSATA interface. Capable of transferring files at up to 375 MB/s, this Thunderbolt adapter also supports the latest multi-drive enclosures with hardware raid controllers, and older ones with port multipliers, enabling you to access up to five drives(1) through one eSATA cable. The eSATA port allows you to boot from an attached drive under OS X®, and offers support for media readers with eSATA interfaces such as the RED STATION REDMAG 1.8" and 2.5". 

Simple to Set Up, Simple to Use

Thunderbolt Cable IconWhen used with a Mac computer, the USB 3.0+eSATA Thunderbolt Adapter requires no setup—the necessary drivers are already installed—just plug it into your computer and it works. When connected to a Windows PC, a simple driver download and installation is all that’s required to get you going.

Bus Powered IconThis device is bus-powered, so there’s no need to connect an AC power adapter, making it perfect for use anywhere. Wherever you use it, the Sonnet USB 3.0+eSATA Thunderbolt Adapter is a simple and cost-effective solution that enables you to simultaneously connect your USB 3.0 and eSATA peripherals without hassle.

 Computer hardware shown in photos for illustration purposes; items sold separately.
See Technical Specs Tab for footnotes
Part No.  
TB-USB3SATA Discontinued
Warranty 1-year
Form Factor Thunderbolt adapter
Bus Interface 10Gbps Thunderbolt
External Connectors
  • USB 3.0
  • eSATA
Dimensions (Adapter)
2.05 x 3.15 x .87 in. (52 x 80 x 22 mm)
RoHS Compliant Yes
Package Contents
  • USB 3.0+eSATA Thunderbolt Adapter
  • Documentaiton
USB 3.0 Support
Drives Supported One (or more with hardware raid enclosure)(1)
Data Transfer Rate
  • 5Gb/s USB 3.0 data rate
  • Up to 350 MB/s achievable data bandwidth
Standard USB Specification v. 3.0/2.0 compatible. Complies with xHCI (Extensible Host Controller Interface)
UASP USB Attached SCSI Protocol supported under OS X 10.8.5+ and Windows 8.1+
Peripherals Supported Supports industry standard USB 3.0, 2.0, and 1.1 peripherals
Cables Supported
  • USB 3.0 with Standard-A male connector
  • USB 2.0 with Standard-A male connector(2)
Chipset ASMedia
Number of Devices Supported Up to 31
Hot Plug Supports hot-pluggable and hot swappable device connection
eSATA Support
Drives Supported One (or more with hardware raid or port multiplier enclosure(1)
Drive Types Supported SATA 6Gb/s, SATA 3Gb/s, and SATA 1.5Gb/s
AHCI Support
System OS X Windows 10, 8, 7
Boot Support (3)  
Port Multiplier Aware
Hot Plug Drive
Advanced Features
  • Supports drive hot-swapping under OS X
  • Supports ATAPI (CD/DVD/Blu-ray) drives
  • Supports port multipliers
  • Supports S.M.A.R.T. status data reporting
  • Supports Spread Spectrum Clocking for compatibility with all SATA drives and lower EMI emissions
Data Transfer Rate Up to 375 MB/s achievable data bandwidth


Specifications subject to change without notice.






Mac Compatibility

Mac with a Thunderbolt or Thunderbolt 2 port

Mac with a Thunderbolt 3 port with an Apple Thunderbolt 3 (USB C) to Thunderbolt 2 Adapter

OS X 10.8.5+

macOS Sierra compatible

PC Compatibility

PC with a Thunderbolt 2 port

Windows® 10, 8, 7

Technical Notes

  1. Support for up to four drives requires the use of drive enclosures employing a hardware RAID controller (like Sonnet’s Fusion™ QR). Support for up to five drives requires the use of drive enclosures equipped with eSATA ports and port multipliers.
  2. USB 3.0 devices require USB 3.0 cables to support USB 3.0 (SuperSpeed) transfer speeds (up to 5 Gb/s). Use of USB 2.0 cables between USB 3.0 devices and the USB 3.0+eSATA Thunderbolt Adapter is supported, but data transfers are limited to USB 2.0 speeds (up to 480 Mb/s).
  3. Supports booting from an attached drive with any Thunderbolt Mac running OS X 10.8.5+.

Mac LogoWindows LogoroHS Logo