Icloud storage

If I downgrade will the 50 gb I bought go away?? Because if I were to downgrade it would go back to the free plan of having 5gb, I already paid for 50gb though..so if I downgrade/cancel my plan will I still be able to keep the 50gb?? Or does it go back down to 5 gb? Anyone know? Any help is appreciated

And sorry for posting to the wrong group