Westfield arkadia parking

Hello, me and my friends are staying in Warsaw and we're trying to figure are out where to park our car for couple days. I have heard that Westfield arkadia has free parking. But sign there says its open from 07am to 01am. Also has some kind of fee for parking at irregular hours i guess which is 200pln. Can anyone explain how does it work or even recommend a good place to park car for couple days. Thank you!