10" inch Rack Synology NAS 4U Modular Integration Kit (DS920+ / DS923+ / DS423+ / DS918+)

Integrating a heavy 4-bay Synology NAS into a compact 10-inch desktop enclosure while staying 100% compatible with standard print beds (250x210 mm) was a real challenge. Initially designed around the constraints of my Prusa Core One, this module was entirely engineered to be easily printed without supports on the vast majority of consumer 3D printers (Prusa MK3, MK4, Core One, etc.), thanks to a clever split design.

To achieve this, and unlike many existing models, this module does not use a traditional suspended tray. Instead, the NAS rests directly on the bottom base plate of the Prox One enclosure, using 4 TPU feet to absorb drive vibrations and secure its alignment.

This solution secures the NAS using a mechanical "sandwich" design : a custom front frame locks the front face of the NAS in place, while a robust multi-role rack, positioned at the upper rear section, holds it firmly. This rear rack also serves as a cable management system.

A lower rear faceplate completes the assembly to cleanly manage the stock connectivity and maintain original cooling performance.

KEY FEATURES :

• •100% Printable Design : No large-format printer required. Both the front and rear faceplates are split into 3 individual printable parts engineered to fit easily on a standard 250x210 mm build plate (Prusa MK3 / MK4 / Core One) with zero supports required.

• Form Factor : 4U height profile / 10-inch rack compatible.

• Installation Depth : Perfect mechanical clearance for a total depth of 240 mm.

• Front Access : Features a tailored cutout giving full access to the 4 drive caddies, status LEDs, power button, and the front-facing USB port.

• Front USB Integration : An integrated left-side slot houses a custom ultra-compact, flush-mount USB-A module to easily extend front connectivity (no bulky commercial Keystone block visible). A solid faceplate version (without the USB cutout) is also included for a quicker setup.

• Rear Exhaust : Features dual massive cutouts tailored for the stock dual fans of the Synology unit, ensuring zero airflow restriction and maintaining original thermal performance.

1. Front Plate

2. Rear Plate

3. Rear Support Rack

4. TPU Centering Feet (x4)

5. NAS Bottom Support Plate

Front & Rear Plates :

     Printable in 3 parts, supportless.

COMPATIBILITY :

This module is fully compatible with the Synology DS423+, DS918+, DS920+, and DS923+ NAS models, which all share the exact same chassis footprint dimensions.

REQUIRED HARDWARE :

• 2 x M6 standard nuts and 2 x M6x15 screws to secure the rear cable organizer onto the rack mount.

• USB-A Keystone adapter (optional, only required if choosing the front plate with the USB cutout) : [Buy here] (the commercial plastic housing can be easily stripped away using a scalpel blade).

• 90-degree USB 3.2 adapter (for clean rear routing) : [buy here].

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IMPORTANT — COMPREHENSIVE MANUAL INCLUDED :

Please do not rely on Printables' auto-generated PDF. For the complete experience, step-by-step assembly instructions, detailed 3D blueprints, and slicer recommendations (including advanced tips like the Fuzzy Skin texture trick), please download the dedicated high-resolution manuals available in the Files tab :

📖 EN_Module_Nas_Assembly_Manual.pdf (English version)

Exclusive model for Printables.com. Please do not re-upload it to other platforms.

LICENSING & REMIXES :

This project is shared under the Creative Commons - Attribution - Non-Commercial - Share-Alike (CC BY-NC-SA) license. Feel free to design and share custom rack faceplates for your specific devices to grow the PROX ONE project, as long as they remain free and non-commercial !

☕ SUPPORT MY WORK :

If you appreciate the numerous hours of engineering and CAD development behind this project, consider supporting my future creations by buying me a coffee or leaving a tip! Your feedback, comments, and makes shared in the gallery are also hugely appreciated.

Buying me a coffee