Saving "Instanced Static Mesches" to SaveGame

Sorry, but i don’t understand this.

I can use normal Blueprints, but I am unable to create something without pictures. (i just cant do it)

I searched the wiki for hours, and it was useless - i can do many things with that engine, but here it comes to an end.

Could you please post a picture of what you described there?

Thank you. (really!)

PS: The whole game depends on this, everything works - expect the load/save-system. (and i did not get it to work for multiple weeks… >.<)

EDIT: I just want to save the position/rotation of every static-mesh-instance that the player placed, and load it again.