This is a "Tower" Case for a Raspberry pi, although it was designed around a model 4 it should also fit a model 3, because the ports sticking out the back have the same layout.

It has space for a external USB HDD/SSD case, so everything is inside. It also features a USB 3.0 hub to get some USB ports up front.

Shopping list of parts needed in addition to the print.

• 12V Power Supply Example: https://www.amazon.de/dp/B01D539K5E

• 2pcs DC-DC Buck converters to get the 12V down to 5V I used 2pcs, one dedicated to the pi running at 5,1V output, and one running at 5.0V output for the USB hub Example: https://www.amazon.de/dp/B07Y81SYVX

• power distribution connectors Example: https://www.amazon.de/dp/B08PCRXXJT

• USB-C cable with open end to power the raspberry pi 4 Example: https://www.amazon.de/dp/B09L2XGFXY

• 12mm momentary switch acting as power/shutdown button Example: https://www.amazon.de/dp/B08L49F7DV

• Logilink USB 3.0 Hub Example: https://www.amazon.de/gp/product/B0096XW86Q

• DC hollow plug 3,5mm/1,35mm to provide juice to the USB Hub Example: https://www.amazon.de/dp/B08LZ1N1SG

• C-14 / Swich combination Example: https://www.amazon.de/dp/B07BN7QFXK

• 80mm case fan Example: https://www.amazon.de/dp/B00IOIJ4AC

• 3 pin fan extension cord If you don't want to cut the case fans cord, and to provide better cable management you can use this to connect the fan Example: https://www.amazon.de/dp/B072QWWS46

• Fan Screws Usually the 80mm fan comes with one set (4pcs) of screws, with is used to screw it into the case, an additional set is needed to get the fan guard screwed on Example: https://www.amazon.de/Akyga-AK-CA-21-L%C3%BCfterschrauben-Screws-L%C3%BCfter/dp/B07TVC4VVJ

• temperature controller for controlling the case fan: Running preferrably at 12V you can use it to switch the case fan on and off directly Example: https://www.amazon.de/dp/B07Y4YH7NM

• Micro HDMI to HDMI Adapter cable, around 30cm in length Example: https://www.amazon.de/dp/B09L4Q2DXR

• Speakon Style HDMI to HDMI Adapter to get the signal outta the case Although I'm running the pi headless with octoprint, it's sometimes usefull being able to connect a screen Example: https://www.amazon.de/dp/B0068W2UWK

• Raspberry Pi 4 active cooling element the fans died on me after 2 days, so I switched them off, just running the case fan, it works fine in combination with the passive heat sinks on the pi, so I just use the integrated LED lighting for fancyness :) Example: https://www.amazon.de/dp/B0814PD7ZM

• M3x ~8-10 all thread If you use the active cooling element, you'll need this to screw the mounting posts on the supporting frame with the raspi board inbetween. I used a longer countersunk screw from the later mentioned set, and snipped of the head

• UGREEN external SSD case used this one in combination with a Kingston A400 SSD. It's known for low power consumption and for working well with a raspberry Example: https://www.amazon.de/gp/product/B07D2BHVBD

• A good handful of M3 screws, M3x6 and M3x8 I once got a full set, always useful around 3D Printers To get a rough number: around 40pcs M3x8 and 30pcs M3x6 Example: https://www.amazon.de/dp/B09SZB2RN6