When printing this armour set orientation, splitting, and slicing is up to you. If you have a small build area and need to print in chunks I recommend splitting the object in either Autodesk Meshmixer or Windows 3D Builder, both of which are free. All files are in .obj format. Most slicers accept this but in case yours cant there are free online tools to convert to .stl. Also keep in mind that you as an individual may have to resize respective to your body type.