Four-bay NAS System Case (ITX motherboard, flex power supply, A1 mini printable)

After creating a 6-bay NAS case for mATX motherboards, I developed this 4-bay NAS system case for ITX motherboards at the request of users, utilizing a Flex 1U power supply, still prioritizing stability (due to concerns about the stability, reliability, and sufficient power of external power supplies). While many excellent ITX motherboard-based NAS cases exist online, my philosophy is that if you're going to 3D print it, it should be as compact as possible and Print in Place (if it's separate parts, you might as well buy a finished product, why print it; printing should offer something different). The external dimensions of the case are only 179.5*178*220mm (WHD), and I maintained the principle that nothing, except the power cable, should visibly protrude from the case, including the USB drive used for Synology system booting

1. Motherboard tray M3*6*8, case backplate M3*40*5, hard drive cage M3*6*16, motherboard M3*6*4, SATA fixing M3*10*16, USB fixing M3*10*2, 40mm fan fixing M2.5*10*4 or M2.5*20*4, 9015 fan fixing M3*25*4, for 4010, 4020, or 9015, any one type will suffice

2. Three cooling fan options were considered: 4010, 4020, and 9015 fans. The front of the case is designed for 40mm fans, where 1 to 4 can be installed. A 9015 fan would protrude 17mm from the case. After installing 40mm fans, the 9015 is entirely unnecessary, leading to a smaller overall volume

3. The case could have been made shorter, but space was reserved for a PCIe SATA adapter card, as some older ITX motherboards lack four SATA ports

4. This iteration of the case was designed with an integrated handle, without increasing its overall volume

5. The IO shield is designed to be replaceable and can also accommodate the motherboard's original shield

6. Each hard drive cage uses 4 m3*8 screws and two springs. The springs can be sourced from ballpoint pens, which are readily available, and one spring can be cut into two for use

7. A1 mini can print this

8. Note: Red parts are PETG Translucent. If unavailable, delete this object in the slicer software; two holes will also work. Other colors are subject to personal preference. For the main enclosure, only support critical areas; otherwise, switches and indicator lights cannot be installed

Other precautions are the same as my 6-bay NAS system case6-bay NAS System Case (mATX Motherboard, SFX Power Supply) - Free 3D Printed Model - MakerWorld