• Overview
  • Tech Specs
  • Performance
  • Accessories

Thunderbolt LogoWorld's Fastest Bus-Powered Thunderbolt 2 Portable Storage

Incorporating the latest PCIe Gen 3 SSD Technology

Do your portable storage requirements include pocket-sized complete mobility, maximum performance, and rugged reliability? The Sonnet Fusion Thunderbolt PCIe Flash Drive delivers it all:

Check MarkMaximum possible performance over Thunderbolt 2 from a single memory module—No RAID 0 needed for maximum performance

Check MarkBus-powered drive for complete portability—No power adapter needed

Check MarkSmall and Rugged—Fits easily in your pocket

Intel Thunderbolt

Key Features

Superior Performance—Data transfer rates of up to
1350 MB/s to support 4K workflows

Bus Powered via Thunderbolt—Achieve total mobility without the need for a power adapter and cable

Pocketable—Fits in the palm of your hand

Thunderbolt 2 Interface—Maximum performance with computers with Thunderbolt 2 technology; backward compatible with 10Gbps Thunderbolt technology

Rugged Construction—Aluminum enclosure with attached Thunderbolt cable withstands heavy use

Boot Support for Macs—Supports booting OS X® 10.9.5+

Mac® and Windows® Compatible—Connects one high-performance PCIe Gen 3 SSD to any Mac or Windows PC with a Thunderbolt 2 or Thunderbolt port


Fusion PCIe Flash Drive In Palm of Hand Icon


4K Video Workflow Support—
In the Palm of Your Hand4K Display

Sonnet’s Fusion PCIe Flash Drive leverages the latest advancements in PCIe SSD design and Thunderbolt 2 technology to create a storage device that fits neatly in the palm of your hand, yet delivers the blazing-fast performance of a multi-drive RAID storage system many times its size. The Fusion flash drive, available with 256GB of storage capacity, is an ultra-fast alternative to common and slower USB thumb drives as well as portable SATA-based hard disk drive and SSD storage products. It connects directly to any Mac or Windows computer with a Thunderbolt 2 or Thunderbolt port, or at the end of a Thunderbolt device daisy chain, via a user-replaceable, captive 0.5-meter Thunderbolt cable.


SSD Icon

Designed with Latest SSD Technology

Sonnet designed the Fusion PCIe Flash Drive around a Gen 3 M.2 PCIe SSD module, the fastest standard SSD type now available and capable of maximizing the bandwidth of the included 20Gbps Thunderbolt 2 interface. One single memory stick provides all the bandwidth necessary for the device to sustain ultra-high file transfer speeds—fast enough to support RAW 4K workflows.

Stop Watch Icon

Amazing Transfer Speeds & Performance

Capable of transferring files at up to 1350 MB/s, the Fusion PCIe Flash Drive incorporates a PCIe Gen 3 flash controller, enabling the device to significantly outperform 6Gb/s SATA SSDs and USB 3.0 flash drives.

Small, Rugged & Bus-Powered Icons

The pocketable Fusion PCIe Flash Drive measures a compact 2.8 inches wide by 4.1 inches deep by 1 inch tall. Its rugged aluminum enclosure effectively cooling the high-performance SSD, which allowed Sonnet to design the device without a fan, enabling silent operation. This power-efficient design also alows the device to be bus-powered and require no power adapter.


Notebook Get Everything Done—Simply Fast

The Fusion PCIe Flash Drive was designed for anybody requiring high-speed storage capabilities, and it is especially well suited to serve as an ultra-fast shuttle drive or a take-anywhere drive for editing 4K video. OS X users may install the operating system on the Sonnet device to create an extremely fast boot drive, while OS X and Windows users alike can use the Fusion PCIe Flash Drive for instant-access media storage or as a high-performance scratch disk.


Fusion PCIe Flash Drive

Feature Icons

Location of Captive Thunderbolt 2 Cable


User-Replaceable Captive Cable

Through the use of a captive cable, the Fusion PCIe Flash Drive’s Thunderbolt 2 cable remains firmly connected to it at all times. Should the need arise, you can easily swap out the cable by removing the drive’s bottom cover, unplugging the damaged cable and then plugging in a replacement.


Part No.  
FUS-TB2-256GB Discontinued
Warranty 1-year
Form Factor Portable storage enclosure
Bus Interface 20Gbps Thunderbolt 2
Power Bus-powered via Thunderbolt connection
Operating Temperature 0˚ C to 40˚ C (32˚ F to 104˚ F)
Data Transfer Speed Up to 1350 MB/s read, 1288 MB/s write, depending on host interface
Boot Support (Mac) Supports booting OS X 10.9.5
Dimensions (WxDxH) 2.8 x 4.1 x 1 in (70 x 103.2 x 26.5 mm)
Weight 10 oz. (290 gm.)
RoHS Compliant Yes
Package Contents
  • Fusion PCIe Flash Drive with 0.5-meter captive Thunderbolt cable
  • Documentation


Specifications subject to change without notice.





Mac Compatibility

Mac with a Thunderbolt 2 or Thunderbolt 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 or Thunderbolt port

Windows 10, 8, 7

Windows Server 2012, 2008

Technical Notes

  1. Although SSD manufacturers and OS X 10.6+ define 1 gigabyte as 1,000,000,000 bytes, many other computer operating systems calculate a gigabyte by dividing the bytes by 1,073,741,824 (). This distinction may be a cause of confusion, as an SSD with a manufacturer rating of 1000GB may have its capacity reported by the operating system as 915GB.

Mac OS logoWindows logoPCI Express LogoRoHS Compliant logo



Fusion PCIe Flash Drive Performance Comparison
Fusion PCIe SSD Flash Drive Speed Chart


Accessories Part No. Description
Thunderbolt Cable ThunderLok Thunderbolt Connector Retainer Clip (2-Pack) TB-LOK2 Secures copper Thunderbolt cables with ThunderLok-compatible products
Thunderbolt Cable Thunderbolt Cable TCB-TB-05M 0.5-meter copper Thunderbolt cable