This is a custom USB-stick holder designed for the Ender 3V2.
The hole is big enough to store the USB-stick with still a bit of wiggle space.
It should snap in the printer in any of the grooves without having to slide it in from the side.
Print with supports and 15% infill.

If your printer works with a micro SD card, it is nice to store your USB-stick close to your printer. 

Print Settings

• Printer brand:

Creality

• Printer:

Ender 3

• Rafts:

No

• Supports:

Yes

• Infill:

15%

• Filament brand:

123-3D, 1,75mm

• Filament material:

PLA