An extended version of the 2 Bay 3.5" HDD Cage made by @MattHope, because 2 bays weren't enough for me and I found this design nice. Keep in mind that general print time is 2-3 days.

The dimensions of the HDD cage are:

LxWxH = 160x(Base: 151 & Cage: 121)x169 mm

The walls are 3mm thick and the caddy rails slots are 7.7mm or 0.3".

Caddy:

For me the distance between my drives was top to bottom 18.5mm and 15.5mm from top to bottom of the caddy. More than enough space for airflow.

You can use this caddy that matches the pattern: https://www.printables.com/model/40826-35-generic-hdd-caddy

The same one with 3 screw holes: https://www.thingiverse.com/thing:5155083

Toolless caddy: https://www.thingiverse.com/thing:5192729

I personally recommend the 3.5" Generic Caddy by Squirtle: https://www.printables.com/model/40826-35-generic-hdd-caddy

Update 25/02/2025: I have noticed that the caddies tend to be hard to pinch in so I would not go higher than 15% infill density on them, perhaps even 10% infill density but I haven't personally tested that.

I recommend to print with the following settings:

Print instructions

Material: PETG Recommended, But PLA(+) works too.
Infill: 30-50%
Supports: HIGHLY Recommended. Use ≤10% support infill. Normal Structure is advised.
Adhesion: Use a Brim of 300mm and I recommend using glue too, because of how tall the print is.
Printing Speed: ≤50 mm/s. This figure holds for most printers, but high-end printers might be able to print faster.
Resolution: 0.2 or 0.16 if you want to go fancy.
Nozzle Diameter: Printed with 0.4mm, 0.6mm will also work.

4 Bay 3.5" HDD Cage

by JuicyLegend · original on Printables ↗

Gadgets / Computers

♥ 360⬇ 3.3k🖨 2 prints

License: Creative Commons — Attribution — Share Alike ↗hddhddmounthddcage

Print profiles

HDD Cage 4 Bay - Open Complete Fillets.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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HDD Cage 4 Bay.stlDEFAULT
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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HDD Cage 4 Bay - Closed Back Fillets.stl
⏱ time and weight estimated after preparation · 1 material(s)
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Prints on: A1 mini 0.4PLA
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HDD Cage 4 Bay - Open Complete Chamfers.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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HDD Cage 4 Bay - Open Back.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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HDD Cage 4 Bay - Open Back Fillets.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Complete.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Back Chamfers.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Closed Back.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Closed Back Chamfers.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay Chamfers.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay Fillets.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay Chamfers.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Back.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Complete.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Closed Back Fillets.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Complete Chamfers.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Closed Back Chamfers.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay Fillets.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Back Fillets.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Complete Fillets.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Closed Back.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print
HDD Cage 4 Bay - Open Back Chamfers.3mf
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print