Skip to content
Magic Prices: Price Comparison
Best Deals

Sonnet Fusion Flex J3i Midi Tower HDD Cage

Sonnet Fusion Flex J3i, Midi Tower, HDD Cage, Black, 2.5,3.5", Mac Pro 7,1 (2019), RoHS 3 (Directive 2015/863)...Read full description ↓

Best offerPrice trend

£192

-25%
Price trend
Detailed analysis ›
Price history of Sonnet Fusion Flex J3i Midi Tower HDD Cage over the last 3 months
DatePrice
1 August 2026£257
4 August 2026£232
18 August 2026£240
16 September 2026£266
23 September 2026£240
26 September 2026£230
26 September 2026£192
30 September 2026£192
1 October 2026£192
9 October 2026£192
12 October 2026£192
12 October 2026£192

Compare Sonnet Fusion Flex J3i Midi Tower HDD Cage prices UK

*Date of last price update

User Notice: We regularly reference new offers to provide you with the widest selection. However, the displayed results do not reflect all available offers on the market. By default, offers are sorted by price, with the lowest price appearing first.

Product Information

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.

Fusion Flex J3i RAID 0 Performance
RAID your SSDs in the Fusion Flex J3i to achieve superior performance

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.

Computer Case Parts Sonnet

Product

Name
Sonnet Fusion Flex J3i Midi Tower HDD Cage
Brand
Sonnet

Weight & dimensions

Width
140 mm
Depth
120 mm
Height
87 mm

Packaging data

Screws included
Yes
Packaging content
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

Features

Compatible chassis type
Midi Tower
Type
HDD Cage
Product colour
Black
Storage drive sizes supported
2.5,3.5"
Number of storage drives supported
3
Compatible products
Mac Pro 7,1 (2019)
Certification
RoHS 3 (Directive 2015/863) IEC62368-1 and IEC62368-2

Customer Reviews

Share your opinion on the product or read reviews from other members.