Questions & Answers about На столе лежит розовая папка.
Because на can take different cases depending on the meaning.
- на стол = onto the table → direction/motion toward a surface
- на столе = on the table → location
Here the folder is already there, so Russian uses the prepositional case: стол → на столе.
Столе is in the prepositional case.
With на, the prepositional case is commonly used when you are talking about a place where something is located:
- на столе = on the table
- на полке = on the shelf
- на полу = on the floor
So in this sentence, на столе tells you the location.