I keep both in baskets, on separate shelves, potatoes on the bottom, aliums abot 15 inches above. Maybe not ideal, butcthe best I can do.
My potatoes are from a CSA, or my garden, I dont eat/buy them often, and they do sprout.
I keep trying to grow both fall/winter.
@Midlife I think fresh means recently dug, not cured, and emitting gasses. I sometimes keep those that say they don’t store well in the fridge. Maybe “sweet”, red, maybe “white”.