Once you build and fill your first silo for your coop/barn (whichever you prefer for whichever farm map!) you can pull all the hay out of the hopper and put it in a chest!
Stardew Valley Silo: The Secret To A Bountiful Harvest
Once you build and fill your first silo for your coop/barn (whichever you prefer for whichever farm map!) you can pull all the hay out...