Yes they have drop box. But drop box place in back of the store. You need to carry the box.
I took a large package in. It was kind of a pain because you have to take it to the back of the store. If you can carry it and it can fit through the door I do not think it would be a problem.
There is usually a customer service person at the single entry front door near 3 or 4 cashier's.
Idk about for large packages but they definitely do have Amazon return dropoff here
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