Korvettes was a full-fledged discount department store that sold clothing, housewares, hardware, toys, seasonal items, furniture, etc. Not really like Walmart or K-Mart because I don't think they sold groceries or health & beauty items like aspirin or shampoo. They did sell cosmetics and fragrances. Many stores had more than one floor. I think the chain was mostly in the northeast US and went out of business around 1981 or so.
The record department was larger than many Sam Goodys or other mall music stores. They had a wide selection in stock, including a lot of punk and new wave that was difficult to find in other stores.