How do i clear space on my ps3?

I just bought burnout paradise on the ps3 store for 20 dollars and when i try to download it it says there isnt enough space... i need 3,300 mbs...i cleared everything i dont need and it still says there isnt enough space on the hard drive how do i clear space on the hard drive? please answer i wanna play it really bad best answer will be chosen as soon as possible