click filament remove to remove the filament if you are inserting your own
When you add into it, remember to thread through this
If you want to use your own filament, this is a recommendation
The easiest way to print stuff is to find things on Thingsverse https://www.thingiverse.com/
For example this keychain
open and download the stl file
drag the stl files in
click slice
after slicing, save the gcode file to an external hard drive (in our case, the mini SD card ) and insert it to the 3D printer