Zone 5B obviously you can't winter them outdoors.
Storing tubers/bulbs/rhizomes is a pain for me and can go south very quickly.
I overwinter my potted ones in the pot. In the dirt.
Make sure the pot isn't watered fro the last two weeks or so before bringing it in.
Then just find a dark cool place and let it dry out. Clip off the leaves after they dry out.
A 4' one should easily get thru that way.
Come Spring find a warm spot and water it once. Light really doesn't matter it's heat.
Then when you start seeing growth, probably a leaf bud or dime sized leaflet, water lightly. Keep warm and bring to light.
Once you see a True Leaf.... not the little dime sized one... water regularly.
I do all my Colocasia e's that way.
Big Alocasias (Macro's etc) I just uproot and throw on the GH floor till Spring
The smaller ones I'd keep going all winter.
Treat it as a house plant. Lots of light very little water.
