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Sonnet Technologies Fusion Flex J3i (3-drive Mounting System for 2019 Mac Pro)
Sonnet Technologies Fusion Flex J3i (3-drive Mounting System for 2019 Mac Pro)

Sonnet Technologies Fusion Flex J3i (3-drive Mounting System for 2019 Mac Pro)


- Add up to 36TB of Storage
- Mount up to Three SATA Drives (sold separately)
- Heavy-gauge Aluminum with Refined Finish
- Simple Installation
- Complete Kit Includes: 2.5-inch Drive Mounting Bracket x2; 2-drive SATA Data/Power Cable Assembly; USB-3 to SATA Data/power adapter cable; Vibration Isolators and Mounting Screws
- 2-year Product Warranty
- Free Lifetime Technical Support
- Designed and Made in the USA

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Fusion Flex J3i

3-drive mounting system for 2019 Mac Pro • Add your own SATA drives


Mount up to Three SATA Drives in Your 2019 Mac Pro

While the 2019 Mac Pro® offers fast 3,400 MB/s internal SSD storage, capacity is limited to 8TB. Connecting external drives is an option, but why not just use the space and connections inside the Mac Pro to add capacity? Sonnet’s Fusion™ Flex J3i makes it easy, enabling you to securely install and connect up to three SATA drives (sold separately) in the available space next to the PCIe card slots.


Install Two 3.5-inch Drives Plus One 2.5-inch SSD

Not only does the Fusion Flex J3i provide support for mounting two 3.5-inch hard drives of your choice, the Flex’s custom design provides mounting support for an additional 2.5-inch SATA SSD. Of course, the necessary mounting hardware and connecting cables are included for a clean installation.


Or Install Three 2.5-inch SSDs

The Fusion Flex J3i includes mounting plates and screws that enable you to install three 2.5-inch SSDs in total.


Custom Design, Rugged Construction

Sonnet designed the Fusion Flex J3i to make maximum use of the space and connections inside the Mac Pro; constructed out of heavy-gauge aluminum, the J3i looks right at home inside the computer. Shock and vibration isolators for 3.5-inch drives protects each drive from cross-coupled vibration from the other, safeguarding against read/write errors and retries. Mounting plates for 2.5-inch drives are included, so there’s no need to purchase separate pieces to use them. Custom power and data cables deliver a clean look to the installation.


Migration Assistant

The Fusion Flex J3i makes it easy to move two 3.5-inch hard drives from your 2010 or 2012 Mac Pro into your 2019 Mac Pro, with no additional adapters or cables required.




Mac Compatibility

Mac Pro 7,1 (2019)


Boot Support

- SSDs/HDS connected to SATA ports (macOS designates external)

  1. Bootable

- SSD connected to USB port (macOS designates internal)

  1. Booting requires Security Setting change to enable external boot


  1. Not bootable







Dimensions (WxDxH)

5.5 x 4.7 x 3.4 in. (14 x 12 x 8.7 cm)



- RoHS 3 (Directive 2015/863)

- IEC62368-1 and IEC62368-2

In the box

- Fusion Flex J3i
- 2.5-inch drive mounting bracket x2
- 2-drive SATA data/power cable assembly
- USB-3 to SATA data/power adapter cable
- Vibration isolators and mounting screws


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