# HDD Cage Sonnet Fusion Flex J3i Midi Tower Black 140mm x 120mm x 87mm

**URL:** https://aio.lv/en/product--sonnet-fus-flex-j3--4042718
**Data updated:** 2026-01-07 20:04 (EET)
**Category:** HDD & SSD Enclosures and Mounting Brackets
**Manufacturer:** Sonnet
**Manufacturer code:** FUS-FLEX-J3
**EAN:** 0732311012990
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 307.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 254.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonnet-fus-flex-j3--4042718

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The Sonnet Fusion Flex J3i is a black HDD cage designed for Midi Tower chassis. It measures 140mm in width, 120mm in depth, and 87mm in height. The product includes two 2.5-inch drive mounting brackets and a SATA data/power cable assembly, making it easy to install additional drives. This cage enhances your system's storage capabilities while maintaining a sleek appearance.

## Long description

The Sonnet Fusion Flex J3i is an internal HDD/SSD mounting cage designed to fit inside the 2019 Mac Pro (and compatible Midi Tower chassis). It lets you add up to three SATA drives using the available space next to the PCIe card slots, expanding storage capacity beyond the Mac Pro’s internal SSD limits. The unit is constructed from heavy-gauge aluminum and includes the mounting hardware and custom power and data cables required for installation.
Advantages
The Fusion Flex J3i supports two 3.5-inch hard drives plus one 2.5-inch SATA SSD, or alternatively three 2.5-inch SSDs using the included mounting plates and screws. Shock and vibration isolators are provided for 3.5-inch drives to reduce cross-coupled vibration and help prevent read/write errors. Its custom power and data cable assembly produces a clean internal appearance and the rugged aluminum construction matches the Mac Pro’s internal styling.
Suitable for
Users who need to increase internal storage capacity in a 2019 Mac Pro
Installing multiple SATA HDDs or SSDs inside a compatible Midi Tower or Mac Pro chassis
Migrating 3.5-inch drives from older 2010/2012 Mac Pro systems into a 2019 Mac Pro
Key specifications
Model: Sonnet Fusion Flex J3i (MPN: FUS-FLEX-J3)
Supported drives: up to two 3.5-inch HDDs + one 2.5-inch SATA SSD, or three 2.5-inch SSDs
Included accessories: two 2.5-inch mounting brackets, mounting plates and screws for 2.5-inch drives, SATA data/power cable assembly
Material: heavy-gauge aluminum
Dimensions (approx.): 140 mm x 120 mm x 87 mm
EAN: 0732311012990
How to use
Install the Fusion Flex J3i into the available space beside the PCIe slots in your 2019 Mac Pro or compatible Midi Tower chassis. Mount your chosen drives using the supplied mounting plates, brackets and screws, connect each drive using the included SATA data/power cable assembly, and secure the cage in place. If desired, configure drives in RAID (for example RAID 0) at the system level to improve sequential performance for SSDs. No additional adapters or cables are required when migrating drives from 2010/2012 Mac Pro systems.
Usage recommendations
For best reliability, use vibration-isolated 3.5-inch drives for mechanical HDDs and ensure proper airflow inside the chassis. When configuring multiple SSDs for maximum performance, verify RAID settings and maintain current backups, as RAID 0 increases performance at the expense of redundancy.

## Specifications

| Feature | Value |
|---|---|
| Storage drive sizes supported | 2.5, 3.5 |
| Compatible chassis type | Midi Tower |

### Storage

| Feature | Value |
|---|---|
| Number of storage drives supported | 3 |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Compatible products | Mac Pro 7,1 (2019) |
| Certification | RoHS 3 (Directive 2015/863)
IEC62368-1 and IEC62368-2 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 87 mm |
| Width | 140 mm |
| Depth | 120 mm |

### Packaging content

| Feature | Value |
|---|---|
| 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 |
| Screws included | Yes |

### Other features

| Feature | Value |
|---|---|
| Type | HDD Cage |

## FAQ

### How much does the HDD Cage Sonnet Fusion Flex J3i cost, and is it available for purchase?

The price is 307.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonnet products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonnet service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: number of storage drives supported, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for HDD Cage Sonnet Fusion Flex J3i?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/4042718/58702571_large.webp